Table 1.
Baseline characteristics of participants in the screening and no-screening groups (2001–2006)
| Characteristic | Screening group (n = 153,107) | No-screening (control) group (n = 1,759,285) |
|---|---|---|
| Mean age (SD), years | 53.6 (8.1) | 53.4 (8.2) |
| Male sex, n (%) | 75,569 (49.4) | 875,241 (49.8) |
| Years of education, n (%)a | ||
| 0–10 | 46,232 (30.8) | 571,727 (33.4) |
| 10–15 | 69,025 (46.1) | 808,851 (47.3) |
| > 15 | 34,648 (23.1) | 330,096 (19.3) |
| European citizenship, n (%)a | 151,937 (99.3) | 1,738,603 (99.0) |
| Previous IHDb , n (%) | 4989 (3.3) | 63,734 (3.6) |
| Previous strokeb , n (%) | 2313 (1.5) | 29,023 (1.7) |
| Previous cancerb , n (%) | 15,210 (9.9) | 179,000 (10.2) |
aTotals do not match denominator owing to missing data
bData taken from the National Patient Registry; data available from 1994 onwards