Follow up periods of the included populations and the number of person years at risk (ages 30+ years)
| Country/Region | Follow up period | Number of person years at risk | |
|---|---|---|---|
| Men | Women | ||
| *Swiss nationals living in the predominantly German speaking cantons. | |||
| Finland | 1991–1995 | 6758254 | 7690004 |
| Norway | 1990–1995 | 5592620 | 6031051 |
| Denmark | 1991–1995 | 7035378 | 7677538 |
| England/Wales | 1991–1996 | 796618 | 894517 |
| Belgium | 1991–1995 | 13047398 | 14587998 |
| France | 1990–1994 | 1432641 | 1192537 |
| Switzerland* | 1991–1995 | 5673634 | 6747784 |
| Austria | 1991–1992 | 2092646 | 2459625 |
| Turin (city of) | 1991–1996 | 1276242 | 1532675 |
| Barcelona (city of) | 1992–1996 | 2263963 | 2798811 |
| Madrid (region of) | 1996–1997 | 2047072 | 2398763 |