Table 2. Baseline characteristics for the linked 1995, 1998 and 2003 Scottish Health Surveys, individually, and combined.
|
Survey |
Combined surveys | |||
|---|---|---|---|---|
| 1995 | 1998 | 2003 | ||
| Sample size | 7170 | 8115 | 7141 | 22 426 |
| Number of deaths, n (%) | ||||
| All-cause | 503 (7.0) | 735 (9.1) | 285 (4.0) | 1523 (6.8) |
| CVD | 148 (2.1) | 245 (3.0) | 116 (1.6) | 509 (2.3) |
| Cancer | 185 (2.6) | 261 (3.2) | 91 (1.3) | 537 (2.4) |
| Non-cancer and non-CVD | 170 (2.4) | 229 (2.8) | 78 (1.1) | 477 (2.1) |
| Person-years of follow-up | 85 629 | 71 597 | 27 216 | 1 84 442 |
| Mean age (s.d.) | 40.9 (12.9) | 45.9 (15.5) | 50.1 (16.8) | 45.6 (15.6) |
| Gender, n (%) | ||||
| Women | 3961 (55.2) | 4551 (56.1) | 3990 (55.9) | 12 502 (55.7) |
| Men | 3209 (44.8) | 3564 (43.9) | 3151 (44.1) | 9924 (44.3) |
| Ethnicity, n (%) | ||||
| White | 7109 (99.1) | 8039 (99.1) | 7015 (98.2) | 22 163 (98.8) |
| Other | 59 (0.8) | 69 (0.9) | 112 (1.6) | 240 (1.1) |
| Missing | 2 (0.0) | 7 (0.1) | 14 (0.2) | 23 (0.1) |
| BMI (kg m−2), n (%) | ||||
| <18.5 (Underweight) | 99 (1.4) | 116 (1.4) | 80 (1.1) | 295 (1.3) |
| 18.5–<25 (Desirable weight) | 3004 (41.9) | 2802 (34.5) | 1973 (27.6) | 7779 (34.7) |
| 25–<30 (Overweight) | 2349 (32.8) | 2812 (34.7) | 2430 (34.0) | 7591 (33.8) |
| ⩾30 (Obese) | 1215 (16.9) | 1662 (20.5) | 1593 (22.3) | 4470 (19.9) |
| Missing | 503 (7.0) | 723 (8.9) | 1065 (14.1) | 2291 (10.2) |
| WC (cm), n (%) | ||||
| M <79 W <68 (Low) | 875 (12.2) | 618 (7.6) | 221 (3.1) | 1714 (7.6) |
| M 79–<94 W 68–<80 (Reference) | 2910 (40.6) | 2750 (33.9) | 1547 (21.7) | 7207 (32.1) |
| M 94–<102 W 80–<88 (Moderate) | 1292 (18.0) | 1532 (18.9) | 1285 (18.0) | 4109 (18.3) |
| M ⩾102 W ⩾88 (High) | 1212 (16.9) | 1818 (22.4) | 1824 (25.5) | 4854 (21.6) |
| Missing | 881 (12.3) | 1397 (17.2) | 2264 (31.7) | 4542 (20.3) |
| WHR, n (%) | ||||
| M<0.85 W <0.7 (Low) | 783 (10.9) | 678 (8.4) | 308 (4.3) | 1769 (7.9) |
| M 0.85–<0.95 W 0.7–<0.8 (Reference) | 3378 (47.1) | 3358 (41.4) | 2063 (28.9) | 8799 (39.2) |
| M 0.95–<1 W 0.8–<0.85 (Moderate) | 1262 (17.6) | 1501 (18.5) | 1184 (16.6) | 3947 (17.6) |
| M ⩾1 W ⩾0.85 (High) | 861 (12.0) | 1174 (14.5) | 1307 (18.3) | 3342 (14.9) |
| Missing | 886 (12.4) | 1404 (17.3) | 2279 (31.9) | 4569 (20.4) |
| Smoking status, n (%) | ||||
| Never smoker | 3074 (42.9) | 3236 (39.9) | 3039 (42.6) | 9349 (41.7) |
| Ex-smoker | 1282 (17.9) | 1916 (23.6) | 2043 (28.6) | 5241 (23.4) |
| Light smoker | 597 (8.3) | 650 (8.0) | 548 (7.7) | 1795 (8.0) |
| Moderate smoker | 1058 (14.8) | 1162 (14.3) | 792 (11.1) | 3012 (13.4) |
| Heavy smoker | 1159 (16.2) | 1142 (14.1) | 715 (10.0) | 3016 (13.4) |
| Missing | — | 9 (0.1) | 4 (0.1) | 13 (0.1) |
| Alcohol consumption, n (%) | ||||
| Never/occasional drinker | 345 (4.8) | 479 (5.9) | 471 (6.6) | 1295 (5.8) |
| Ex-drinker | 258 (3.6) | 397 (4.9) | 348 (4.9) | 1003 (4.5) |
| 0–<7 units per week | 3139 (43.8) | 3537 (43.6) | 3133 (43.9) | 9809 (43.7) |
| 7–<14 units per week | 1280 (17.9) | 1391 (17.1) | 1316 (18.4) | 3987 (17.8) |
| 14–<21 units per week | 853 (11.9) | 885 (10.9) | 749 (10.5) | 2487 (11.1) |
| 21–<28 units per week | 478 (6.7) | 494 (6.1) | 405 (5.7) | 1377 (6.1) |
| ⩾28 units per week | 817 (11.4) | 920 (11.3) | 711 (10.0) | 2448 (10.9) |
| Missing | — | 12 (0.1) | 8 (0.1) | 20 (0.1) |
| Individual social class, n (%) | ||||
| I/II-Professional/managerial | 1885 (26.3) | 2257 (27.8) | 2334 (32.7) | 6476 (28.9) |
| III-Skilled non-manual | 1577 (22.0) | 1750 (21.6) | 1555 (21.8) | 4882 (21.7) |
| III-Skilled manual | 1487 (20.7) | 1661 (20.5) | 1327 (18.6) | 4475 (20.2) |
| IV-Partly skilled | 1188 (16.6) | 1423 (17.5) | 1220 (17.1) | 3831 (17.0) |
| V-Unskilled | 578 (8.1) | 605 (7.5) | 471 (6.6) | 1654 (7.4) |
| Other | 455 (6.3) | 419 (5.2) | 234 (3.3) | 1108 (4.8) |
| Carstairs quintile, n (%) | ||||
| 1-Least deprived | 1292 (18.0) | 1431 (17.7) | 1336 (18.7) | 4059 (18.1) |
| 2 | 1496 (20.9) | 1640 (20.2) | 1716 (24.0) | 4852 (21.6) |
| 3 | 1468 (20.5) | 1950 (24.0) | 1532 (21.5) | 4950 (22.1) |
| 4 | 1297 (18.1) | 1501 (18.5) | 1287 (18.0) | 4085 (18.2) |
| 5-Most deprived | 1613 (22.5) | 1585 (19.5) | 1270 (17.8) | 4468 (19.9) |
| Missing | 4 (0.1) | 8 (0.1) | — | 12 (0.1) |
Abbreviations: BMI, body mass index; CVD, cardiovascular disease; M, men; W, women; WC, waist circumference; WHR, waist–hip ratio.