Table I.
Demographic characteristics of the people participating in the four waves of the Helsinki Ageing Study.
| I (1989) N=660 | II (1999) N=2598 | III (2009) N=1637 | IV (2019) N=1758 | p for linearity | |
|---|---|---|---|---|---|
| Women, n (%) | 484 (73) | 1851 (71) | 1126 (69) | 1128 (64) | <0.001 |
| Age (years), n (%) | <0.001 | ||||
| 75 | 245 (37) | 735 (28) | 399 (24) | 424 (24) | |
| 80 | 220 (33) | 716 (28) | 393 (24) | 420 (24) | |
| 85 | 195 (30) | 643 (25) | 357 (22) | 394 (22) | |
| 90–95 | 0 (0) | 504 (19) | 488 (30) | 520 (30) | |
| Widowed, n (%) | 291 (45) | 1179 (47) | 681 (42) | 604 (36) | <0.001 |
| Education <8 years (%) | 427 (74) | 1337 (54) | 603 (37) | 417 (25) | <0.001 |
| CCI, M (SD) | 1.4 (1.3) | 2.1 (1.9) | 2.0 (1.8) | 1.7 (1.6) | 0.023 |
CCI: Charlson Comorbidity Index [18]; SD: standard deviation.