Neighbourhood characteristics
| Study | Definition of neighbourhood | Number of neighbourhoods included in study | Median number of residents (range) | Median number of study participants per neighbourhood (range) |
|---|---|---|---|---|
| ARIC | Block groups | 443 | 1633 (347–4773) | 19 (1–136) |
| GLOBE | Administrative | 84 | 2025 (86–9807) | 113 (4–352) |
| Whitehall II | Electoral wards | 2207 | 6,237 (717–29071) | 2 (1–55) |
| Helsinki | Administrative | 55 | 14,090 (3699–26401) | 4733 (1229–9155) |
| Turin | Administrative | 92 | 7986 (40–29789) | 4,872 (24–19012) |
| Madrid | Census tracts | 2136 | 1220 (451–3894) | 894 (318–3116) |