Table 2.

The Target Population in 8 National Health Examination Surveys in the Americas and the United Kingdom, 2007–2013

Protocol	Survey Year	Age Range of Surveyed, years	No. of Stages	Sampling of Individuals	Excluded From Sample	Other Exclusion Criteria
WHO STEPS standard	N/A	25–64	N/A	No. of individuals selected	N/A	N/A
Brazil, PNS	2013	≥18	3	One resident aged ≥18 years randomly selected among eligible residents	Age <18 years	Uninhabited private household, noncontact, and refusal
Chile, ENS	2009–2010	≥15	4	One resident aged ≥15 years randomly selected among eligible residents of selected households; double probability for aged ≥65 years	Age <15 years	Pregnant women; people with violent behavior; people who do not speak Spanish
Colombia, ENSIN	2010	0–64	4	All individuals of interest in the household	Age >65 years	Only for anthropometric measurements: women who had given birth in the 3 months preceding the survey
Colombia, ENS	2007	0–69	4	Aged <18 years: all individuals of interest in the household. Aged 18–69 years: 1 randomly selected if <4 individuals aged 18–69 years at the household; 2 randomly selected if ≥4 residents aged 18–69 years	Age >69 years	Absence at time of the interview due to work or study
Mexico, ENSANUT	2012	All	4	If possible, 1 individual from each of: children <5 years; children 5–9 years; adolescents; adults; and 1 or 2 health services users	Uninhabited private household	Absence at time of the interview
England, HSEa	2013	All	3	All adults (maximum of 10) at selected address	Business or institutionsb, vacant buildings, demolished buildings, building still being built	Lack of mental capacity to give informed consent; people who do not speak English
Scotland, SHeSa	2008–2011	All	3	All adults (maximum of 10) at selected address	Business or institutionsb, vacant buildings, demolished buildings, building still being built	Lack of mental capacity to give informed consent; unable to speak English
United States, NHANESa	2011–2012	All	4	A subsample of individuals selected based on sex, age, race and Hispanic origin, and income	Deadwood (not a residential address); institutionalized individual military personnel and citizens living outside the United States	Failure to provide written consent treated as a refusal to participate

Abbreviations: ENS, Encuesta Nacional de Salud; ENSANUT, Encuesta Nacional de Salud y Nutrición; ENSIN, Encuesta Nacional de Situación Nutricional; HSE, Health Survey for England; N/A, not applicable; NHANES, National Health And Nutrition Examination Survey; PNS, Pesquisa Nacional de Saúde; SHeS, Scottish Health Survey; STEPS, STEPwise Approach to Surveillance; WHO, World Health Organization.

^a These surveys have been run repeatedly, and the methods have changed little. Results in this table are for the most recent year, as an example.

^b Residents living in institutions (e.g., prisons, residential or nursing care, student halls of residence) were excluded, for practical reasons.