Characteristics of the Stirling County Study samples enrolled in 1952, 1970 and 1992 (n = 3410)
| Characteristic | Participants enrolled in 1952 | Participants enrolled in 1970 | Participants enrolled in 1992 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| All n = 1003 | Women n = 547 | Men n = 456 | All n = 1203 | Women n = 605 | Men n = 598 | All n = 1402 | Women n = 761 | Men n = 641 | |
| No. of deaths through 2011 (% of sample) | 925 (92.2) | 489 (89.4) | 436 (95.6) | 854 (71.0) | 394 (65.1) | 460 (76.9) | 444 (31.7) | 226 (29.7) | 218 (34.0) |
| Age at enrolment, mean ± SD | 49.7 ± 16.5 | 48.9 ± 17.1 | 50.7 ± 15.7 | 49.1 ± 17.5 | 48.6 ± 18.1 | 49.7 ± 16.8 | 49.6 ± 17.3 | 50.0 ± 17.7 | 49.2 ± 16.7 |
| Current depression status, no. (%) | |||||||||
| Current depression | 60 (6.0) | 36 (6.6) | 24 (5.3) | 70 (5.8) | 35 (5.8) | 35 (5.9) | 91 (6.5) | 60 (7.9) | 31 (4.8) |
| No depression | 943 (94.0) | 511 (93.4) | 432 (94.7) | 1133 (94.2) | 570 (94.2) | 563 (94.2) | 1311 (93.5) | 701 (92.1) | 610 (95.2) |
| Mortality rate per 1000 person-years among participants with and without current depression | |||||||||
| Current depression | 38.1 | 29.8 | 61.6 | 32.7 | 27.7 | 39.5 | 28.6 | 23.9 | 39.4 |
| No depression | 29.2 | 25.9 | 35.2 | 25.2 | 21.3 | 29.8 | 19.2 | 17.8 | 20.9 |
| Education, no. (%) | |||||||||
| < Grade 5 | 170 (17.0) | 63 (11.5) | 107 (23.5) | 111 (9.2) | 36 (6.0) | 75 (12.5) | 47 (3.4) n = 1400 | 11 (1.5) | 36 (5.6) n = 639 |
| Grade 5–10 | 655 (65.3) | 360 (65.8) | 295 (64.7) | 835 (69.4) | 408 (67.4) | 427 (71.4) | 703 (50.2) n = 1400 | 357 (46.9) | 346 (54.2) n = 639 |
| ≥ Grade 11 | 178 (17.8) | 124 (22.7) | 54 (11.8) | 257 (21.4) | 161 (26.6) | 96 (16.1) | 650 (46.4) n = 1400 | 393 (51.6) | 257 (40.2) n = 639 |
| Cigarettes smoked per day, no. (%) | |||||||||
| None | 505 (50.4) | 412 (75.3) | 93 (20.4) | 577 (48.0) | 399 (66.0) | 178 (29.8) | 921 (66.5) n = 1385 | 546 (72.4) n = 754 | 375 (59.4) n = 631 |
| > 20 | 103 (10.3) | 8 (1.5) | 95 (20.8) | 147 (12.2) | 24 (4.0) | 123 (20.6) | 226 (16.3) n = 1385 | 86 (11.4) n = 754 | 140 (22.2) n = 631 |
| < 20 | 395 (39.4) | 127 (23.2) | 268 (58.8) | 479 (39.8) | 182 (30.1) | 297 (49.7) | 238 (17.2) n = 1385 | 122 (16.2) n = 754 | 116 (18.4) n = 631 |
| Alcohol abuse, no. (%) | 39 (4.1) n = 953 | 3 (0.6) n = 523 | 36 (8.4) n = 430 | 69 (6.4) n = 1080 | 8 (1.5) n = 551 | 61 (11.5) n = 529 | 97 (7.0) n = 1395 | 16 (2.1) n = 757 | 81 (12.7) n = 638 |
| Obesity, no. (%) | 68 (7.1) n = 953 | 51 (9.8) n = 523 | 17 (4.0) n = 430 | 149 (12.4) n = 1201 | 92 (15.2) n = 604 | 57 (9.6) n = 597 | 314 (22.5) n = 1396 | 176 (23.2) n = 758 | 138 (21.6) n = 638 |
Note: SD = standard deviation.