Sampling errors
Body Mass  of the adult population, by sex and age group. Population aged 18 years old and over. Variation coefficient.
Units: percentages

	Underweight (BMI < 18.5 kg/m2)	Normal weight (18.5 kg/m2 <= BMI < 25 kg/m2)	Overweight (25 kg/m2 <= BMI < 30 kg/m2)	Obesity (BMI >= 30 kg/m2)	
BOTH SEXES	
    Total	6.81	1.27	1.34	2.13	
    18 to 24 years old	12.26	4.08	8.45	13.44	
    25 to 34 years old	13.99	3.05	4.38	7.29	
    35 to 44 years old	16.80	2.75	3.15	5.27	
    45 to 54 years old	18.36	3.32	3.24	4.71	
    55 to 64 years old	22.36	4.09	3.52	4.56	
    65 to 74 years old	31.45	4.86	3.65	4.69	
    75 to 84 years old	30.85	5.74	4.35	5.69	
    85 years old and over	25.49	8.99	9.01	12.84	
MALES	
    Total	15.62	2.20	1.76	2.91	
    18 to 24 years old	23.96	5.74	10.68	18.42	
    25 to 34 years old	39.73	4.69	5.39	9.67	
    35 to 44 years old	39.08	4.71	3.78	6.58	
    45 to 54 years old	41.77	5.50	4.16	5.92	
    55 to 64 years old	73.69	7.38	4.59	6.36	
    65 to 74 years old	62.35	7.46	4.91	7.11	
    75 to 84 years old	95.81	9.37	6.27	9.29	
    85 years old and over	41.94	13.37	16.26	21.33	
FEMALES	
    Total	7.55	1.64	2.21	3.23	
    18 to 24 years old	14.28	5.74	14.09	20.04	
    25 to 34 years old	14.54	3.89	7.57	11.23	
    35 to 44 years old	18.25	3.35	5.83	8.78	
    45 to 54 years old	20.33	4.04	5.28	7.76	
    55 to 64 years old	23.44	4.89	5.23	6.67	
    65 to 74 years old	36.42	6.33	5.30	6.30	
    75 to 84 years old	32.54	7.37	5.85	7.25	
    85 years old and over	32.18	12.17	10.77	16.10	
Notes:
1) Body Mass Index BMI = [weight(kg) / height(m) squared]
The symbol '.' shall be deemed as data which cannot be given due to an insufficient sample.
 The symbol '..' shall be deemed as data which are not collected for this classification in the table.
 The symbol '...' shall be deemed as an error of division by zero.
 The data corresponding to cells with fewer than 35 thousand persons must be considered with caution,  as they may be affected by a high degree of sampling error.
Source: Ministry of Public Health, Social Services and Equality and INE