Table 4.
Basic characteristics of the respondents in 1996, 2002, and 2015, N = 9682
| Variables | 1996 | 2002 | 2015 | p |
|---|---|---|---|---|
| Response rate N (%) | 2323 (67) | 5241 (56) | 2118 (36) | |
| Age (years) | ||||
| Mean (±SD) | 44.9 (±16.5) | 47.4 (±16.9) | 55.5 (±14.1) | <.001* |
| Min.–Max. | 19–80 | 18–96 | 18–79 | |
| Age groups, N (%) | ||||
| ≤29 years | 510 (22.0) | 870 (16.6) | 105 (5.0) | |
| 30–39 years | 487 (21.0) | 1016 (19.4) | 203 (9.6) | |
| 40–49 years | 446 (19.2) | 1080 (20.6) | 403 (19.0) | |
| 50–59 years | 363 (15.6) | 980 (18.5) | 484 (22.9) | |
| 60–69 years | 283 (12.2) | 657 (12.9) | 525 (24.8) | |
| ≥70 years | 234 (10.1) | 620 (11.8) | 398 (18.8) | |
| Gender, N (%) | ||||
| Female | 1192 (51.3) | 2698 (51.5) | 1149 (54.2) | .023** |
| Male | 1131 (48.7) | 2543 (48.5) | 947 (44.7) | |
| Education, N (%) | ||||
| Second level, first stage | 621 (27.0) | 765 (14.6) | 377 (17.9) | <.001** |
| Second level, second stage | 1036 (45.0) | 2910 (55.5) | 782 (37.1) | |
| Third level (university college or university) | 643 (28.0) | 1503 (28.7) | 949 (45.0) | |
| Living situation, N (%) | ||||
| Alone | – | – | 358 (16.9) | |
| With children | – | – | 632 (29.8) | |
| With other adults | – | – | 1127 (53.2) | |
Missing data: 1996 [N, (%)]: education: 23 (1.0), 2002 [N, (%)]: education: 63 (1.2%), 2015 [N, (%)]: gender: 22 (1.0), education: 10 (0.5), living situation: 1 (<0.001), * One-way ANOVA ** X2