Table 1.
Characteristics of participants by body mass index category
| Underweight | Normal weight | Overweight | Obese | Morbidly obese | ‡p-value | Overall | |
|---|---|---|---|---|---|---|---|
| N = 67 | N = 1,797 | N = 2,276 | N = 1,319 | N = 149 | N = 5, 608 | ||
| N (%) | N (%) | N (%) | N (%) | N (%) | N (%) | ||
| Age (years) | |||||||
| 20-44 | 32 (47.8) | 937 (52.1) | 858 (37.7) | 440 (33.4) | 54 (36.2) | < 0.001 | 2,321 (41.4) |
| 45-64 | 21 (31.3) | 562 (31.3) | 916 (40.3) | 549 (41.6) | 75 (50.3) | 2,123 (37.9) | |
| ≥ 65 | 14 (20.9) | 298 (16.6) | 502 (22.1) | 330 (25.0) | 20 (13.4) | 1, 164 (20.8) | |
| Sex | |||||||
| Male | 26 (38.8) | 688 (38.3) | 1,183 (52.0) | 598 (45.3) | 36 (24.2) | < 0.001 | 2,531 (45.1) |
| Female | 41 (61.2) | 1,109 (61.7) | 1,093 (48.0) | 721 (54.7) | 113 (75.8) | 3,077 (54.9) | |
| Deprivation quintile | |||||||
| 1 (Least deprived) | 14 (20.9) | 389 (21.7) | 498 (21.9) | 218 (16.5) | 16 (10.7) | < 0.001 | 1,135 (20.2) |
| 2 | 11 (16.4) | 413 (23.0) | 537 (23.6) | 258 (19.6) | 30 (20.1) | 1,249 (22.3) | |
| 3 | 9 (13.4) | 385 (21.4) | 503 (22.1) | 337 (25.6) | 29 (19.5) | 1,263 (22.5) | |
| 4 | 14 (20.9) | 322 (17.9) | 427 (18.8) | 276 (20.9) | 26 (17.6) | 1,065 (19.0) | |
| 5 (Most deprived) | 19 (28.4) | 288 (16.0) | 311 (13.7) | 230 (17.4) | 48 (32.2) | 896 (16.0) | |
| Metabolic comorbidity | |||||||
| No | 59 (88.1) | 1,632 (90.8) | 1,899 (83.4) | 990 (75.0) | 107 (71.8) | < 0.001 | 4,687 (83.6) |
| Yes | 8 (12.0) | 165 (9.2) | 377 (16.6) | 329 (25.0) | 42 (28.2) | 921 (16.4) | |
| Smoking status | |||||||
| Never smoker | 21 (31.3) | 748 (41.6) | 1, 002 (44.0) | 599 (45.4) | 60 (40.3) | < 0.001 | 2, 430 (43.3) |
| Ex-smoker | 7 (10.5) | 409 (22.8) | 737 (32.4) | 447 (33.9) | 56 (37.6) | 1, 656 (29.5) | |
| Current smoker | 39 (58.2) | 640 (35.6) | 537 (23.6) | 273 (20.7) | 33 (22.2) | 1, 522 (27.1) | |
| Drinking status | |||||||
| Never drinker | 12 (17.9) | 89 (5.0) | 106 (4.7) | 72 (5.5) | 8 (5.4) | < 0.001 | 287 (5.1) |
| Ex-drinker | 5 (7.5) | 83 (4.6) | 85 (3.7) | 62 (4.7) | 14 (9.4) | 249 (4.4) | |
| Sensible drinker* | 39 (58.2) | 1, 266 (70.5) | 1, 560 (68.5) | 936 (70.9) | 100 (67.1) | 3, 901 (69.5) | |
| Excessive drinker | 11 (16.4) | 352 (19.7) | 522 (23.0) | 246 (18.7) | 27 (18.1) | 1, 158 (20.7) | |
| Missing | 0 (0) | 7 (0.39) | 3 (0.13) | 3 (0.23) | 0 (0) | 13 (0.23) | |
‡chi-square tests for trend * < 21 units/week for men, < 14 units/week for women