Survey | Year(s) of the survey | Sampling frame | Target population | Sample selection | Original sample size | Eligible sample size | % of sample ineligible | Ineligibility criteria |
---|---|---|---|---|---|---|---|---|
England – Health Survey for England | 2011 | Address file – the small user Postcode Address File | People of all ages living in private households. | 1. Random sample of postcode sectors, stratified by region and % non-manual occupation. | 8 992 households | 8 088 households | 10 % | Business or institutions, vacant buildings, demolished buildings, building still being built. |
2. Random sample of private addresses within selected postcode sectors from the Postcode Address File. | ||||||||
3. Up to 10 adults and two children in each selected household. | ||||||||
Finland – FINRISK Study | 2012 | Population register | People aged 25–74 years living in five regions of Finland. | A random sample of individuals stratified by sex, 10-year age group and five regions. | 10 000 individuals | 9 905 individuals | 1 % | Died, moved away from research area. |
Germany – DEGS | 2008-2011 | Local population registers | People aged 18–79 years and living in Germany. | Participants of former survey the German National Health Interview and Examination Survey 1998 (GNHIES98) plus new random sample: | 17 117 individuals | 15 974 individuals | 7 % | For new sample: |
Died, moved away from research area. | ||||||||
Unable to understand basic German. | ||||||||
1. Random sample of points within Germany. | ||||||||
For re-invited participants from GNHIES98: | ||||||||
2. Random sample of individuals within these points. | ||||||||
Died or moved abroad. | ||||||||
Ireland – SLAN | 2007 | Address file – the GeoDirectory | People aged 18 years and over living in private households. | 1. Random sample of sampling points based on aggregates of townlands. | 19 185 households for interview | 16 681 households for interview | 13 % | Vacant buildings, non-residential building, demolished building, address which could not be located. |
18–44 years old had questionnaire and anthropometric measurements at home. 45+ years old were invited to the more extensive examination at the examination centre. | ||||||||
2. Systematic sample of addresses within selected sampling points. | ||||||||
3. A selection of a person within household by simple randomization procedure by next birthday rule. | ||||||||
Italy – OEC/HES | 2008-2012 | Population register | People aged 35–79 years, living in the 20 Italian Regions. | Screening centres selected in each region based on availability of personnel, space, laboratory facilities and willingness to collaborate on study. Within each selected municipality of screening centre, a random sample of participants was selected by age-group and sex. | 17 052 individuals | 16 447 individuals | 4 % | Undelivered letter, died, emigrates, working outside the residence area for all survey period. |
Netherlands – NLdeMaat | 2009-2010 | Population register | People aged 18–70 years (phase I) and 30–70 years (phase II) living in five Dutch towns. | 1. Division of country into five regions. | 15 000 individuals | 14 163 individuals | 6 % | Diet, moved away from the region. |
2. Random sample of three sampling points (towns) from each region. | ||||||||
3. Random sample individuals stratified by sex and 10-year age group. | ||||||||
Scotland – Scottish Health Survey | 2010 | Address file – the small user Postcode Address File | People of all ages living in private households. | 1. Random sample of postcode sectors, stratified by area and deprivation. | 8 382 households (2 194 households for nurse visit) | 7 564 households | 10 % | Business or institutions, vacant buildings, demolished buildings, building still being built. |
2. Random sample of private addresses within selected postcode sectors. | ||||||||
3. All adults and up to two children in each selected household. |