- Methods and Projects
- Standards and Classifications
Standardised Methodological Report
Disability, Independence and Dependency Situations Survey
- 1Contact
- 1.1Contact organisation
National Statistics Institute of Spain
- 1.5Contact mail address
Avenida de Manoteras 50-52 - 28050 Madrid
- 1.1Contact organisation
- 2Metadata update
- 2.1Metadata last certified
07/05/2024
- 2.2Metadata last posted
30/04/2024
- 2.3Metadata last update
07/05/2024
- 2.1Metadata last certified
- 3Statistical presentation
- 3.1Data description
EDAD 2020 households
The general objective of EDAD2020 is to meet the demand for information from Public Administrations and numerous users such as organizations from the Third Sector of Social Action, providing a statistical base for the planning of policies aimed at people with disabilities that allow the promotion of personal autonomy and the prevention of dependency situations. In addition, it is designed to obtain information on the health of the caregivers of people with disabilities, as well as the time dedicated to care and the repercussions on their personal life, both work and leisure.
The purpose of the EDAD2020 edition is to update the information on EDAD 2008 and, therefore, it also contemplates the philosophy of the International Classification of Functioning, Disability and Health (ICF).
The specific objectives to be achieved with this survey are:
- Estimate the number of people with disabilities residing in Spain in family dwellings, both nationally and by autonomous community
- Know the number and type of disabilities of people with disabilities.
- Estimate the number of households in which a person with a disability resides.
- Know the different types of limitations in the activity of people with disabilities, as well as the severity of said limitations.
- Investigate the use or need for technical or personal aids to overcome the limitation and find out the severity of these limitations using said aid.
- Identify the deficiencies that cause the disability.
- Know the general health status and certain diagnoses of people with disabilities.
- Evaluate equal opportunities (discrimination) of people with disabilities in the workplace, education, mobility accessibility and technological accessibility.
- Know the social and economic benefits received by people with disabilities.
- Find out about spending on disability in households where people with disabilities live.
- Investigate possible socioeconomic differences between households with people with disabilities and households without people with disabilities.
- Know the situation of the main caregivers of people with disabilities.
EDAD2023 centers
The purpose of the EDAD 2023 centres is to study people with disabilities residing in Spain, focusing the study on the population residing in collective housing, which is known as the institutional population, thus completing the part not included in the AGE 2020 households, which carried out the study of family homes.
The purpose EDAD2020 the edition homes and EDAD2023 centres is to update the information of EDAD 2008 and therefore also contemplates the philosophy of the International Classification of Functioning, Disability and Health (ICF).The specific objectives that are intended to be achieved with this survey are:
1. To estimate the number of people with disabilities residing in Spain in centres for the elderly, centres for people with disabilities, sheltered and/or supervised housing, psychiatric hospitals and geriatric hospitals, as well as their geographical distribution.
2. Know the number and type of disabilities of people with disabilities.
3. Know the limitations on activity and the restrictions on participation in situations of people's daily lives, as well as the severity of these limitations.
4. To know the characteristics of people with disabilities and in situations of dependency in these centres.
5. Identify the different types of deficiencies that give rise to the limitations, as well as the causes that have generated these deficiencies.
6. Assess discrimination against people with disabilities in different areas of daily life.
7. Identify the needs and demands for assistance, as well as the support received and its characteristics. Know the use of technical aids, special adaptations, personal care, etc.
8. To know the main characteristics of the collective centres where people with disabilities reside, as well as the services they provide
9. Conducting disability analysis from a gender perspective
10. Know the general state of health and certain diagnoses of people with disabilities.
11. To know the disability expenditure of the people who reside in the centres.
12. Know the information related to the social contacts of people with disabilities residing in centres.
13. Know the accessibility problems to move both inside and outside the centres.
14. Know the self-care they receive.
- 3.2Classification system
- Clasificaciones utilizadas
AGE 2020 households uses three standardized classifications in its exploitation of results:
- International Classification of Functioning, Disability and Health (ICF)
- National Classification of Economic Activities CNAE 2009
- National Classification of Occupations CNO 2011
- National Classification of Education CNED14-A
AGE 2023 centers uses three standardized classifications in its exploitation of results:
- International Classification of Functioning, Disability and Health (ICF)
- Clasificaciones utilizadas
- 3.3Sector coverage
EDAD 2020 households
The research is aimed at the group of people aged 2 and over who reside in main family dwellings in
the entire national territory.EDAD 2023 centers
The research is aimed at people aged six or older who reside in Residential Centers for the Elderly, Centers for People with Disabilities, Long-stay Psychiatric and Geriatric Hospitals, and Sheltered and/or Supervised Housing.
- 3.4Statistical concepts and definitions
- 3.5Statistical unit
EDAD 2020 households
The unit is the person aged 2 and over residing in the main family dwelling.
EDAD 2023 centers
The unit is the person aged 6 and over residing in Centers for the Elderly, Centers for People with Disabilities, Long-Stay Psychiatric and Geriatric Hospitals, and Sheltered and/or Supervised Housing.
- 3.6Statistical population
The total population or universe to which EDAD 2020 households refers is the population residing in main family dwellings.
The total population or universe referred to in EDAD 2023 centers is the population that resides in Centers for the Elderly, Centers for People with Disabilities, Long-Stay Psychiatric and Geriatric Hospitals, and Sheltered and/or Supervised Housing.
- 3.7Reference area
EDAD 2020 households
The Survey is carried out throughout the national territory.
The sample design allows providing the objective variables with a territorial disaggregation level of the Autonomous Community.Provincial level estimates will be provided using small area estimators.
EDAD 2023 centers
The Survey is carried out throughout the national territory.
The sample design allows providing the objective variables with a territorial disaggregation level of the Autonomous Community. - 3.8Time coverage
The Disability Survey was carried out for the first time in 1986, and since then there have been 3 more editions.
The different disability surveys carried out are: Survey on Disabilities, Deficiencies and Handicaps (EDDM-1986), Survey on Disabilities, Deficiencies and State of Health (EDDS-1999), Survey on Disability, Personal Autonomy and Dependency Situations (EDAD 2008, EDAD 2020 households and EDAD 2023 centers) with a periodicity of 10 -12 years.
- 3.9Base period
Given the periodicity of this survey (10-12 years) the methodology of each survey varies. Bearing in mind that the ICF is applied in the 2008 edition, this methodological change can be considered the beginning of the series.
- 3.1Data description
- 4Unit of measure
- 4.1Unit of measure
Number of persons (Data provided in terms of absolute figures)
Percentage of persons (Data provided in terms of relative figures)Rates per 1,000 inhabitants
- 4.1Unit of measure
- 5Reference period
- 5.1Reference period
The reference period of the Survey on Disability, Personal Autonomy and Dependency Situations 2020 households is the year 2020.
The reference period of the Survey on Disability, Personal Autonomy and Dependency Situations 2020 centers is the year 2023.
- 5.1Reference period
- 6Institutional mandate
- 6.1Legal acts and other agreements
The compilation and dissemination of the data are governed by the Statistical Law No. 12/1989 "Public Statistical Function" of May 9, 1989, and Law No. 4/1990 of June 29 on “National Budget of State for the year 1990" amended by Law No. 13/1996 "Fiscal, administrative and social measures" of December 30, 1996, makes compulsory all statistics included in the National Statistics Plan. The National Statistical Plan 2009-2012 was approved by the Royal Decree 1663/2008. It contains the statistics that must be developed in the four year period by the State General Administration's services or any other entity dependent on it. All statistics included in the National Statistics Plan are statistics for state purposes and are obligatory. The National Statistics Plan 2021-2024, approved by Royal Decree 1110/2020, of 15 December, is the Plan currently implemented. This statistical operation has governmental purposes, and it is included in the National Statistics Plan 2021-2024. (Statistics of the State Administration).
In response to the recommendations of the United Nations Convention on the rights of persons with disabilities, included in the Action Plan of the Spanish Strategy on Disability 2014-2020, which proposes, among other actions, to "promote the inclusion of the disability variable, also considering the gender approach, in the studies and surveys carried out by public bodies dependent on the General State Administration, especially the INE", the National Statistical Plan 2017-2020 prior to the "Survey of Disability, Personal Autonomy and Dependency Situationsâ (PEN Code: 7751. IOE code: 30418).
On the other hand, the International Convention on Rights has been reinforced by the clear relationship between the meaning of the Sustainable Development Goals (SDG) of the 2030 Agenda and the purpose of the Convention. Disability is specifically referenced, in addition to the introduction, in various SDGs such as 4, on education; 8, on employment, 10, on reducing inequalities and 11 on inclusiveness of cities and accessibility of transport. The 2030 Agenda emphasizes the need for data disaggregated by disability as part of the monitoring of the SDGs.
This statistical operation investigates variables of those included in article 11.2 of the LFEP (ethnic origin, political opinions, religious or ideological convictions and those that affect personal or family privacy) so it is voluntary.
- 6.2Data sharing
The exchanges of information needed to elaborate statistics between the INE and the rest of the State statistical offices (Ministerial Departments, independent bodies and administrative bodies depending on the State General Administration), or between these offices and the Autonomic statistical offices, are regulated in the LFEP (Law of the Public Statistic Function). This law also regulates the mechanisms of statistical coordination, and concludes cooperation agreements between the different offices when necessary.
The tabulation and the anonymized microdata file will be available for download on the INE website.
https://www.ine.es/dyngs/INEbase/es/operacion.htm?c=Estadistica_C&cid=1254736176782&menu=ultiDatos&idp=1254735573175
- 6.1Legal acts and other agreements
- 7Confidentiality
- 7.1Confidentiality - policy
The Statistical Law No. 12/1989 specifies that the INE cannot publish, or make otherwise available, individual data or statistics that would enable the identification of data for any individual person or entity. Regulation (EC) No 223/2009 on European statistics stipulates the need to establish common principles and guidelines ensuring the confidentiality of data used for the production of European statistics and the access to those confidential data with due account for technical developments and the requirements of users in a democratic society
- 7.2Confidentiality - data treatment
INE provides information on the protection of confidentiality at all stages of the statistical process: INE questionnaires for the operations in the national statistical plan include a legal clause protecting data under statistical confidentiality. Notices prior to data collection announcing a statistical operation notify respondents that data are subject to statistical confidentiality at all stages. For data processing, INE employees have available the INE data protection handbook, which specifies the steps that should be taken at each stage of processing to ensure reporting units' individual data are protected. The microdata files provided to users are anonymised.
.
- 7.1Confidentiality - policy
- 8Release policy
- 8.1Release calendar
The advance release calendar that shows the precise release dates for the coming year is disseminated in the last quarter of each year.
- 8.2Release calendar access
The calendar is disseminated on the INEs Internet website (Publications Calendar)
- 8.3User access
The data are released simultaneously according to the advance release calendar to all interested parties by issuing the press release. At the same time, the data are posted on the INE's Internet website (www.ine.es/en) almost immediately after the press release is issued. Also some predefined tailor-made requests are sent to registered users. Some users could receive partial information under embargo as it is publicly described in the European Statistics Code of Practice
- 8.1Release calendar
- 9Frequency of dissemination
- 9.1Frequency of dissemination
The INE has carried out four macro-surveys on disability: The Survey on Disabilities, Deficiencies and Handicaps EDDM 1986, the Survey on Disabilities, Deficiencies and State of Health 1999 and the Survey on Disability, Personal Autonomy and Dependency Situations (AGE) in 2008, in 2020 aimed at homes and in 2023 aimed at centers.
Since the first Disability Survey carried out by the INE, information has been disseminated with an approximate frequency of 10-12 years.
- 9.1Frequency of dissemination
- 10Accessibility and clarity
- 10.1News release
The results of the statistical operations are normally disseminated by using press releases that can be accessed via both the corresponding menu and the Press Releases Section in the web
.
- 10.2Publications
The results of the Disability, Personal Autonomy and Dependency Situations Survey are published on the INE website:
In addition, other INE summary publications publish information from this survey, such as the Statistical Yearbook, INE Figures, Infographics...
The users themselves disseminate the results of the Survey thanks to the articles, the result of their research, published in scientific journals of national and international prestige.
- 10.3On-line database
INEbase is the system the INE uses to store statistical information on the Internet. It contains all the information the INE produces in electronic formats. The primary organisation of the information follows the theme-based classification of the Inventory of Statistical Operations of the State General Administration . The basic unit of INEbase is the statistical operation, defined as the set of activities that lead to obtaining statistical results on a determined sector or subject based on the individually collected data. Also included in the scope of this definition are synthesis preparation.
Access to the databases is through INEbase / Society / Health / Surveys on disabilities, or through the following link:
- 10.4Micro-data access
A lot of statistical operations disseminate public domain anonymized files, available free of charge for downloading in the INE website Microdata Section
Access to microdata is made through INEbase / Society / Health / Surveys on disabilities, or at the following link:
- 10.5Other
The INE will answer queries from users through the InfoINE channel:
- 10.6Documentation on methodology
A detailed description of the methodology is available at:
- 10.7Quality documentation
The INE carries out two specific analyses to assess the quality of EDAD data. Firstly, sampling errors are obtained for the main variables that are published together with the tabulation of results. And secondly, an analysis of non-response is performed and published on the website. Both results can be found on the EDAD results dissemination page:
In addition, the following sections of this methodological report (items 11 to 17) constitute the user-oriented global quality report for this operation.
- 10.1News release
- 11Quality management
- 11.1Quality assurance
Quality assurance framework for the INE statistics is based on the ESSCoP, the European Statistics Code of Practice made by EUROSTAT. The ESSCoP is made up of 16 principles, gathered in three areas: Institutional Environment, Processes and Products. Each principle is associated with some indicators which make possible to measure it. In order to evaluate quality, EUROSTAT provides different tools: the indicators mentioned above, Self-assessment based on the DESAP model, peer review, user satisfaction surveys and other proceedings for evaluation.
For the EDAD 2020 households and EDAD 2023 centers, a series of measures have been implemented that contribute to guarantee the quality of the process and the results. Among them are the following:
- Specific review of the questionnaire in a Working Group with the participation of experts in the field of disability.
- Cognitive pretest of disability questions in the household questionnaire.
- Exhaustive technical tests of the electronic questionnaires (CAWI and CATI) in order to verify the controls of inconsistencies in the answers.
- Pilot test , prior to AGE 2020 homes, to verify the feasibility of carrying out the survey in two phases, the first (CATI/CAWI) aimed at the entire sample to detect households that are candidates for having a disability through a filter questionnaire, and the second phase (CAPI) to confirm the disability in those candidate households obtained in the first phase.
- Cognitive pretest to assess questions about limitations in children aged 2 to 5 years.
- Translation of the questionnaires to "Easy Reading" by experts to reduce proxy responses in the case of older people with cognitive impairment or people with intellectual disabilities.
- Specific training for interviewers with the participation of disability experts from the Working Group and the INE.
-In the AGE 2020 households, data collection through the CAWI application, CATI to detect households with people with disabilities and CAPI to investigate the situation of people with disabilities and children with limitations. The CATI, CAWI and CAPI questionnaires include the implementation of errors and incompatibility warnings between the survey responses to carry out the first filtering at the time the information is collected.
- In the AGE 2023 centers, data collection through the CAWI application, CATI for the collection of information from the centers and CAPI to investigate the situation of people with disabilities within the centers. The CATI, CAWI and CAPI questionnaires include the implementation of errors and incompatibility warnings between the survey responses to carry out the first filtering at the time the information is collected. In all cases the collection is carried out through electronic means.
- In the EDAD 2020 househols, use of administrative records ( State Database for People with Disabilities of the IMSERSO, Information System of the System for Autonomy and Attention to Dependency of the IMSERSO, Register of Inhabitants, State Tax Administration Agency, Provincial Treasury of BizKaia, Provincial Treasury of Gipuzkoa and Hacienda de Ãraba/ Ãlava.
- In the EDAD 2023 centers, use of administrative records (IMSERSO, CSIC) and information provided by CERMI for the preparation of the collection framework prior to the sample design.
- Inspection of field work. It is worth mentioning the numerous wiretaps of the CATI questionnaires by INE technicians to verify the quality of the interviews carried out by this channel.
- Revision of the coding of the variables (studies, activity and occupation)
- Control of errors and warnings after the collection in order to corroborate the correct functioning of the applications and avoid systematic errors in the collection
- 11.2Quality assessment
According to the measures implemented in the process of collecting and filtering the results described in the previous section, the strengths of the survey are:
- Sample more efficient: EDAD 2020 has been carried out in two phases, the first (CATI/CAWI) aimed at the entire sample to detect the households that are candidates for having a disability through a filter questionnaire, and the second phase (CAPI) to confirm the disability in those candidate households obtained. in phase 1. The availability of administrative records, and specifically of the State Database for Persons with Disabilities, has made it possible to interview households in which at least one person lived with degree of dependency II or III and/or with a certificate of disability of 75% or higher. with a single contact, since having a very high probability of having a disability according to AGE, they were contacted directly via CAPI.
- The completeness of the questionnaire when collecting the different dimensions that may appear in a disability survey, responding to the information requested by users.
- the absence of errors and inconsistencies between the responses to the questionnaires thanks to the controls introduced in the electronic questionnaire, which allow a first filtering at the time of the interview.
- Adequate classification according to the sociodemographic variables due to the exhaustive filtering of the variables of studies, activity, occupation and composition of the household.
- lack of response similar to those of health surveys.
- results calibrated by age, sex and nationality.
- 11.1Quality assurance
- 12Relevance
- 12.1User needs
The main users of the survey:
- Ministry of Social Rights and 2030 Agenda
- Territorial administrations (CCAA)- Social Action Third Sector Organizations
- Researchers and universities
- Press and specialized media
- Individuals
The needs of users pursue different purposes, to cite a few examples, for the Ministry of Social Affairs and Agenda 2030 this information is a fundamental element for the planning and adoption of social public policies and constitutes a fundamental instrument in its evaluation of social policies and in the preparation of the National Disability Strategy. It provides a statistical basis for the planning of policies aimed at people with disabilities that allow the promotion of personal autonomy and the prevention of dependency situations. It is enough to mention, for example, the great repercussion that EDAD 2008 had for the development of the Law for the Promotion of Personal Autonomy and Attention to people in situations of dependency; in the case of researchers, they focus on a detailed and specialized exploitation of information. - 12.2User satisfaction
The INE has carried out general user satisfaction surveys in 2007, 2010, 2013, 2016 and 2019 and it plans to continue doing so every three years. The purpose of these surveys is to find out what users think about the quality of the information of the INE statistics and the extent to which their needs of information are covered. In addition, additional surveys are carried out in order to acknowledge better other fields such as dissemination of the information, quality of some publications...
On the INE website, in its section Methods and Projects / Quality and Code of Practice / INE quality management / User surveys are available surveys conducted to date.(Click next link)
Fundamentally, EDAD is a key instrument in the planning of social policies by the Ministry of Social Affairs and the 2030 Agenda.
EDAD is widely used by researchers from Third Sector social action organizations, part of whose research is published in various prestigious national and international journals..
- 12.3Completeness
The survey is not regulated by European directive. The requirements are marked by the needs of government areas and expert researchers in the field of disability who need the perception and information of citizens in relation to disability, its determinants and consequences. The questionnaire has been debated and agreed upon in a working group in which representatives of the main users participate and the content responds to the need for information. All these characteristics have been included in the National Statistical Plan, to which this statistical operation is subject.
All the variables that have been set for the questionnaire have been collected and exploited or made available to users in the microdata file.
EDAD 2020 households
The variable with the greatest lack of partial response in previous editions has been that related to income. In AGE 2020 it will be obtained from the tax data.R1=100%
EDAD 2023 centers
The variable with the greatest lack of partial response in previous editions has been that related to expenses. In AGE 2023, it has been investigated through a questionnaire question.
R1=71.44%
- 12.1User needs
- 13Accuracy and reliability
- 13.1Overall accuracy
The estimators used are ratio estimators with a large sample size at the national level, which makes it possible to ensure unbiased estimators and with a small sampling error for the main variables. On the other hand, reweighting techniques (calibration) are applied according to sex, age and nationality. , which allows adjusting the results of the deviations that occur due to the usual lack of response in some groups within the household surveys (for example, overrepresentation of older people).
On the other hand, possible sources of collection error of the interviewer factor are controlled and inspected, investigating the highest deviations of mean responses for the main variables, avoiding bias in the results by areas.
Finally, the exhaustive purification carried out by technicians with extensive experience and with homogeneous criteria for the entire team allows us to ensure global accuracy. - 13.2Sampling error
The coefficients of variation of the main variables are published. The results can be found within the survey tabulation at the following link:
EDAD 2020 households
CV of the main variables:
Households with a person with a disability A1 = 0.75
Households with two people with disabilities A1 =2.61
Persons aged 6 and over with disabilities Both sexes A1 = 0.12 Persons aged 6 and over with disabilities Men A1 =1.03
People aged 6 and over with disabilities Women A1 =0.72
EDAD 2023 centers
CV of the main variables:
Persons with disabilities in centers Both sexes A1=0.91
Persons with disabilities in centers Men A1=1.86
Persons with disabilities in centers Women A1=1.18
- 13.3Non-sampling error
The main source of non-sampling error is due to non-response by households. Health and disability surveys are traditionally well received, so collaboration rates are usually among the highest in household surveys, although this time collaboration has been affected by the pandemic situation.
EDAD2020 households
Over coverage rate A2= 0%
Non-response rate per unit (Dwellings not surveyed / Surveyable dwellings) A4= 16.2%
Non-response rate per item (A5)- Deficiency origin of the disability A5 = 4.4%
- Sanitary services received A5 =0.36%
- Social Services received A5 = 0.93%
- School enrollment for children aged 6-15 years A5 = 0.24%
- Architectural barriers housing A5 = 1.8%
- Perception of discrimination due to disability at school (6-15 years) A5 = 1.8%
- Perception of discrimination due to disability in the work environment A5 =1.8%
Imputation rate (A7)=
- Type of household A7 = 0.49%
- Educational level A7 = 0.64%
- Deficiency of origin A7 = 0%
- Schooling A7 = 0%
- Relationship with the main caregiver (people aged 6 and over) A7 = 3.2%
A full non-response analysis document is provided and can be found at the following link:EDAD 2023 centers
Over coverage rate A2= 0%
Non-response rate per unit (Centers not surveyed / Surveyable centers) A4= 11.5%
Non-response rate per item (A5)- Deficiency origin of the disability A5 =2.48%
- Health status assessment A5=0.38%
- Perception of discrimination A5=9.5%
- Frequency of visits or meetings with family or friends A5=1.28%
- Frequency of telephone contact, social networks with family or friends A5=2.33%
- Contact rating A5=2.97%
- Places in the center and outside it according to the difficulty of functioning due to barriers or lack of adaptations A5=3.18%
- Difficulty due to disability in being able to use information and communication technologies A5=6.82%- Assistance or personal care received other than that provided by the center A5=0.98%
- Expenses associated with disability A5=27.77%Imputation rate (A7)=
- Disability A7=1.63%
- Main deficiency A7=3.38%
- Cause of Disability A7=3.06%
- 13.1Overall accuracy
- 14Timeliness and punctuality
- 14.1Timeliness
EDAD 2020 households
The information collection period runs from August 2020 to October 2021, with 2020 being the reference year.
The tabulated results have been published in April 2022, 6 months after the collection was completed. An advance with the main results was previously published, two weeks before the detailed publication, that is, 5 and a half months after the collection was completed.
Lag final results TP2 = 6 monthsEDAD 2023 centers
The information collection period extends from July 2023 to October 2023, with 2023 being the reference year.
The tabulated results were published in April 2024, 6 months after the collection ended.
Final results lag TP2 = 6 months - 14.2Punctuality
Data dissemination is carried out in accordance with the structural statistics availability calendar that the INE prepares and publishes each year.
Timeliness (T3)= The calendar is complied with
- 14.1Timeliness
- 15Coherence and Comparability
- 15.1Comparability - geographical
The sample design allows the comparison of results at the Autonomous Community level.
In the case of EDAD 2020 households, provincial estimates are also provided by small areas for the disability variable.
- 15.2Comparability - over time
The criteria for the design of the questionnaires for the EDAD 2020 households and EDAD 2023 centers editions, and to determine the methodology have been, among others, to maintain the series with the EDAD 2008. However, given the time that has elapsed between both editions, there are variables/questions that have had to be updated. Therefore, although comparability will be possible in most of the variables, both in homes and in centers, it will not be complete.
Length of comparable time series (CC2) =2 - 15.3Coherence - cross domain
Although the definition of disability analyzed is different, the results on work activity provided by EDAD are consistent with the results derived from the Employment Survey of Persons with Disabilities.
To calibrate the EDAD 2020 households elevation factors, calibration techniques are applied in such a way as to guarantee consistency with the INE population figures.
To calibrate the elevation factors of the EDAD 2023 centers, calibration techniques have been applied in such a way as to guarantee consistency with the figures obtained from the framework expressly developed for the survey.
- 15.4Coherence - internal
The coherence between the variables is contrasted from the moment the data is collected at home through the IRIA questionnaires and is reviewed during the filtering process at the office. This process has made it possible to provide all the variables collected in the questionnaire.
- 15.1Comparability - geographical
- 16Cost and burden
- 16.1Cost and burden
- The information collection method of the survey has been developed in two phases. The first phase had the purpose of locating those homes in which people with disabilities and/or children with limitations live and identifying these people as well as their disabilities. The use in phase 1 of a shorter questionnaire than in 2008 to detect households with disabilities or limitations and the CAWI/CATI channels have substantially reduced the burden on informants. These collection channels have also reduced the cost of the operation.
- The use of administrative information in the design has also made it possible to obtain a reduction in cost, detecting households in the theoretical sample in which there was a high probability of having a person with a disability and reducing the number of contacts to one instead of two.
- The use of IRIA questionnaires makes it possible to reduce the informant's burden from the point of view of interview time in relation to the 2008 edition in which a paper questionnaire was used.
- The reduction of the burden for informants was also present in the working group in charge of preparing the EDAD 2020 questionnaires. An effort was made to reduce the size of the questionnaire, analyzing the questions of the EDAD 2008 and the needs of the users, eliminating questions that were not subsequently exploited or that could be obtained from other sources.
- The estimate of the budget credit necessary to finance this survey is included in several annual programs:
PA2020= 2,988.39 thousand euros; PA 2021=171.01 thousand euros; PA2022= 51.01 thousand euros
PA2023=984.95 thousand euros; PA2024=129.32 thousand euros ;
- 16.1Cost and burden
- 17Data revision
- 17.1Data revision - policy
The INE of Spain has a policy which regulates the basic aspects of statistical data revision, seeking to ensure process transparency and product quality. This policy is laid out in the document approved by the INE board of directors on 13 March of 2015, which is available on the INE website, in the section "Methods and projects/Quality and Code of Practice/INE’s Quality management/INE’s Revision policy" (link).
This general policy sets the criteria that the different type of revisions should follow: routine revision- it is the case of statistics whose production process includes regular revisions-; more extensive revision- when methodological or basic reference source changes take place-; and exceptional revision- for instance, when an error appears in a published statistic-.
Definitive data are published and are not subject to revision.
- 17.2Data revision - practice
The published data are final, not subject to revision.
- 17.1Data revision - policy
- 18Statistical processing
- 18.1Source data
EDAD 2020 households
The information collection method of the survey has been multichannel (CAWI/CATI/POSTAL MAIL/CAPI) and has been developed in two phases. The first phase is intended to locate those households in which people with disabilities and/or children with limitations live. In order to locate people with disabilities or children with limitations, the first phase questionnaire, called the Household Questionnaire, contains a block of filter questions about possible disabilities and limitations for each of the household members. The people who declared having great difficulty or not being able to do some activity were interviewed in the second phase.
The second phase was CAPI and CATI and aimed to obtain more detailed information on people aged 6 and over with disabilities detected in phase 1 and children between 2 and 5 years with limitations, information not only referring to their state of health, on which the deficiency of origin of the disability will be investigated, but also referred to the availability or need for technical or personal aids, accessibility, social benefits, education, employment, personal relationships, social environment, care. In the case From children with limitations from 2 to 5 years of age, information will be obtained on the deficiency that caused the limitation, on the availability and need for personal and technical aids and on the care they receive. Two questionnaires were used: Disability Questionnaire (people aged 6 and over) and Limitations Questionnaire (children aged 2 to 5).
In this second phase, information was also obtained from the main caregiver through a questionnaire for this purpose.
In order to meet the objectives of the survey of being able to provide estimates with a certain degree of reliability at the national and autonomous community levels, a sample of 110,000 dwellings is selected with the aim of obtaining an effective sample of 75,000.
The sampling has been two-stage with stratification of the first-stage units. The first stage units are census tracts and the second are primary family dwellings. No subsampling is carried out in the homes. Information is collected from all the people who have their regular residence in these homes.
EDAD 2023 centers
The survey collection method was multi-channel (CAWI/CATI/CAPI) and was developed in two phases.
In the first phase, the directory of centres and a survey have been prepared to confirm the final framework.
The centres considered in the survey are those in which people with disabilities are mainly located, i.e. residential centres for the elderly, residential centres for people with disabilities and long-stay hospitals (geriatric and psychiatric), to which are added the sheltered or supervised housing, not studied in the previous edition.
The board confirmation survey was conducted through CAWI and CATI.In the second phase, the survey of centers and people was carried out.
A web questionnaire (CAWI) was available for the collection of information in the case of questionnaires addressed to schools, although there was the possibility of completing the questionnaire with a personal interview (CAPI). Depending on the type of center, a different questionnaire adapted to the characteristics of the center was prepared.
Once the center questionnaire was completed, the interviewer conducted the personal interviews. The selection of people was carried out randomly and completely anonymously (without collecting identification data) to guarantee confidentiality. Participation was voluntary.
Individual interviews (people) were conducted by means of a personal interview (CAPI) with each selected person, if necessary and justified, it was allowed that the interview be carried out through another person sufficiently informed about the selected person, such as a caregiver or a family member (PROY interview).In order to meet the objectives of the survey to be able to provide estimates with a certain degree of reliability at national and autonomous community level, a sample of 965 centres has been selected with the aim of obtaining a theoretical sample of 13,774 persons.
A stratified two-stage sampling was used. The first-stage units are the centres, and the second-stage units are the people who reside in the centres. The stratification variables used were those available in the directory and that have allowed to improve the efficiency of the design. The main variables were the autonomous community, the type of centre and the size of the centre measured in terms of the number of places (or beds in the case of hospitals).
- 18.2Frequency of data collection
The survey has been carried out irregularly every 10-12 years.
- 18.3Data collection
EDAD 2020 households
The information collection method of the survey has been multichannel (CAWI/CATI/CORREO/CAPI) and has been developed in two phases. The first phase with three collection channels (CAWI/CATI/CORREO) and the second CAPI and CATI.
The second phase collection was initially designed for CAPI but the pandemic situation forced the use of the CATI channel as well.
The data collection was carried out from August 2020 to October 2021
EDAD 2023 centers
The method of collecting information for the survey was multichannel (CAWI/CATI/CAPI) and was developed in two phases. The first phase has three collection channels (CAWI/TISC) and the second phase has CAWI and CAPI.Data collection was conducted from July 2023 to October 2023.
- 18.4Data validation
The information supervision process to guarantee its quality is carried out in two phases:
1/ During the development of the interview: computer-assisted interviews (CAWI, CATI, CAPI) allow rules to be incorporated into the electronic questionnaire to validate errors and inconsistencies that must be corrected at the same time as the interview. Likewise, they allow the incorporation of notices about slight inconsistencies to be compared directly with the informant.
2/ Office jobs: Once the data is received, a debugging application allows an exhaustive control of the data, analyzing errors, serious inconsistencies, minor inconsistencies, extreme values, monitoring of marginal distributions, cross tables...
In a complementary way, crosses are programmed or subsets of data are extracted to analyze specific variables.
Serious errors or invalid values, if any, are detected in the first weeks
of the information collection period and allow perfecting the electronic questionnaire.
Errors in CATI and CAPI that may be due to misinterpretation of questions are transmitted to the
interviewers so that they take it into account during the development of their work. - 18.5Data compilation
Among the processes applied to the initial data until obtaining diffusible aggregate data are:
1/ Data cleaning, as described in the previous section
2/ Periodic comparisons of the sample pyramid with the population pyramid, to control the representativeness of the sample against the variables age and sex
3/ Control of socioeconomic variables
4/ Non-response adjustment and calibration
5/ Calculation and review of elevation factors. - 18.6Adjustment
No temporary adjustments are made.
- 18.1Source data
- 19Comment
- 19.1Comment
- 19.1Comment