Table 1 Descriptive statistics (frequency with percentage or mean with standard deviation, SD) for different DP diagnosis groups in the final sample of 24,987 Swedish twins
|  | DP due to MSD1 (n = 1252) | DP due to mental2 (n = 601) | DP due to other diagnoses3 (n = 1162) | No DP (n = 21,972) | ||||||||||||
Unhealthy behaviours (n = 602) | Healthy behaviours (n = 650) | Unhealthy behaviours (n = 297) | Healthy behaviours (n = 304) | Unhealthy behaviours (n = 604) | Healthy behaviours (n = 558) | Unhealthy behaviours (n = 11,950) | Healthy behaviours (n = 10,022) | |||||||||
N | % | N | % | N | % | N | % | N | % | N | % | N | % | N | % | |
Sex (women) | 350 | 58 | 474 | 73 | 198 | 67 | 222 | 73 | 296 | 49 | 329 | 59 | 5161 | 43 | 5631 | 56 |
Marital status (living with someone) | 425 | 71 | 448 | 69 | 179 | 60 | 167 | 55 | 410 | 68 | 382 | 68 | 8278 | 69 | 6956 | 69 |
Children living at home (yes) | 402 | 67 | 447 | 69 | 206 | 69 | 202 | 66 | 380 | 63 | 388 | 70 | 8648 | 72 | 7149 | 71 |
Type of living area (semi-rural/rural) | 226 | 38 | 272 | 42 | 77 | 26 | 97 | 32 | 166 | 27 | 226 | 41 | 3472 | 29 | 3491 | 35 |
Occupational groups | ||||||||||||||||
 Administration & management | 61 | 10 | 60 | 9 | 51 | 17 | 45 | 15 | 91 | 15 | 86 | 15 | 2247 | 19 | 1752 | 17 |
 Technology, natural and social science & art | 44 | 7 | 45 | 7 | 62 | 21 | 79 | 26 | 102 | 17 | 88 | 16 | 2411 | 20 | 2015 | 20 |
 Health care & social work | 135 | 22 | 191 | 29 | 89 | 30 | 89 | 29 | 104 | 17 | 136 | 24 | 1924 | 16 | 2055 | 21 |
 Commercial work | 45 | 7 | 51 | 8 | 18 | 6 | 17 | 6 | 42 | 7 | 28 | 5 | 1046 | 9 | 668 | 7 |
 Agriculture, forestry & fishing | 21 | 3 | 30 | 5 | 3 | 1 | 4 | 1 | 14 | 2 | 13 | 2 | 315 | 3 | 429 | 4 |
 Transport | 43 | 7 | 29 | 4 | 13 | 4 | 13 | 4 | 38 | 6 | 31 | 6 | 602 | 5 | 453 | 5 |
 Production & mining | 174 | 29 | 144 | 22 | 42 | 14 | 33 | 11 | 151 | 25 | 121 | 22 | 2466 | 21 | 1764 | 18 |
 Service & military work | 79 | 13 | 100 | 15 | 19 | 6 | 24 | 8 | 62 | 10 | 55 | 10 | 930 | 8 | 886 | 9 |
Self-rated health | ||||||||||||||||
 Good | 313 | 52 | 285 | 44 | 157 | 53 | 146 | 48 | 294 | 49 | 263 | 47 | 10,138 | 85 | 8243 | 82 |
 Moderate | 172 | 29 | 203 | 31 | 83 | 28 | 78 | 26 | 188 | 31 | 160 | 29 | 1513 | 13 | 1454 | 15 |
 Poor | 116 | 19 | 161 | 25 | 56 | 19 | 80 | 26 | 120 | 20 | 135 | 24 | 293 | 2 | 312 | 3 |
| Â | mean | SD | mean | SD | mean | SD | mean | SD | mean | SD | mean | SD | mean | SD | mean | SD |
Age at 1990 (years) | 54.3 | 4.5 | 55.0 | 4.6 | 53.5 | 4.5 | 53.5 | 4.5 | 54.4 | 4.4 | 54.4 | 4.6 | 52.6 | 5.4 | 53.6 | 5.8 |
Job demands (range 1–10, high score is low) | 6.3 | 0.7 | 6.3 | 0.8 | 5.8 | 0.8 | 5.9 | 0.8 | 6.0 | 0.7 | 6.1 | 0.7 | 5.9 | 0.7 | 6.0 | 0.7 |
Job control (range 1–10, high score is high) | 6.1 | 1.2 | 6.1 | 1.2 | 6.7 | 1.2 | 6.6 | 1.1 | 6.6 | 1.3 | 6.5 | 1.3 | 6.9 | 1.2 | 6.4 | 1.3 |
Social support (range 1–10, high score is high) | 6.4 | 0.7 | 6.6 | 0.7 | 6.5 | 0.5 | 6.6 | 0.5 | 6.3 | 0.6 | 6.5 | 0.6 | 6.3 | 0.6 | 6.4 | 0.6 |
Education in years | 5.2 | 2.8 | 4.9 | 3.0 | 7.3 | 3.1 | 7.1 | 2.9 | 6.0 | 3.0 | 5.9 | 3.1 | 6.9 | 2.9 | 6.5 | 3.0 |
BMI | 25.5 | 3.5 | 25.8 | 4.0 | 24.7 | 3.7 | 25.3 | 4.2 | 25.0 | 3.6 | 25.4 | 3.9 | 24.7 | 3.1 | 24.9 | 3.4 |