Table 1.
Baseline characteristics according to randomisation group
| Characteristic | Vitamin D (n 10 239) | Placebo (n 10 184) | ||
|---|---|---|---|---|
| n | % | n | % | |
| Sex | ||||
| Men | 5533 | 54·0 | 5513 | 54·1 |
| Women | 4706 | 46·0 | 4671 | 45·9 |
| Age (years) | ||||
| 60–64 | 2558 | 25·0 | 2542 | 25·0 |
| 65–69 | 2822 | 27·6 | 2802 | 27·5 |
| 70–74 | 2779 | 27·1 | 2755 | 27·1 |
| ≥ 75 | 2080 | 20·3 | 2085 | 20·5 |
| Predicted 25(OH)D concentration (nmol/l) | ||||
| < 50 | 2428 | 23·7 | 2459 | 24·1 |
| ≥ 50 | 7811 | 76·3 | 7725 | 75·9 |
| BMI (kg/m2) | ||||
| < 25 | 3149 | 30·9 | 3021 | 29·8 |
| 25 to < 30 | 4296 | 42·1 | 4400 | 43·3 |
| ≥ 30 | 2762 | 27·1 | 2732 | 26·9 |
| Missing | 32 | 31 | ||
| Smoking history | ||||
| Never | 5616 | 55·2 | 5558 | 55·0 |
| Ex-smoker | 4173 | 41·1 | 4103 | 40·6 |
| Current | 376 | 3·7 | 438 | 4·3 |
| Missing | 74 | 85 | ||
| History of diabetes | ||||
| No | 9358 | 91·7 | 9336 | 91·9 |
| Yes | 843 | 8·3 | 822 | 8·1 |
| Missing | 38 | 26 | ||
| History of depression | ||||
| No | 9648 | 94·6 | 9589 | 94·4 |
| Yes | 551 | 5·4 | 570 | 5·6 |
| Missing | 40 | 25 | ||
| History of chronic pain | ||||
| No | 7988 | 78·3 | 7930 | 78·1 |
| Yes | 2211 | 21·7 | 2227 | 21·9 |
| Missing | 40 | 27 | ||
| History of arthritis | ||||
| No | 5657 | 55·5 | 5555 | 54·8 |
| Yes | 4532 | 44·5 | 4587 | 45·2 |
| Missing | 50 | 42 | ||
| Living alone | ||||
| No | 8186 | 80·3 | 8148 | 80·4 |
| Yes | 2004 | 19·7 | 1984 | 19·6 |
| Missing | 49 | 52 | ||
| Self-rated overall health | ||||
| Excellent, very good | 5680 | 56·4 | 5612 | 55·9 |
| Good, fair, poor | 4395 | 43·6 | 4434 | 44·1 |
| Missing | 164 | 138 | ||
| Self-rated quality of life | ||||
| Excellent, very good | 6762 | 67·5 | 6782 | 68·0 |
| Good, fair, poor | 3252 | 32·5 | 3192 | 32·0 |
| Missing | 225 | 210 | ||
All the variables are self-reported other than sex, age and predicted 25(OH)D concentration.
25(OH)D, 25-hydroxy vitamin D.