Table 1 Numbers and proportions of new-onset traumatic and non-traumatic musculoskeletal pain in 1113 follow-up responders free of musculoskeletal pain at baseline, stratified by baseline factors (Lahti schoolchildren population sample, 1995–1996).
Variables | Category | Total number | Non-traumatic musculoskeletal pain, N (%) | Traumatic musculoskeletal pain, N (%) |
|---|---|---|---|---|
Sex | Male | 542 | 86 (15.9) | 24 (4.4) |
| Â | Female | 571 | 130 (22.8) | 20 (3.5) |
Age | 9–10 years | 538 | 99 (18.4) | 22 (4.1) |
|  | 11–13 years | 575 | 117 (20.3) | 22 (3.8) |
°Headache | Yes | 228 | 66 (29.0) | 12 (5.3) |
| Â | No | 867 | 150 (17.3) | 31 (3.6) |
°Abdominal pain | Yes | 118 | 37 (31.4) | 5 (4.2) |
| Â | No | 980 | 178 (18.2) | 38 (3.9) |
°Feeling sad/down | Yes | 126 | 38 (30.2) | 6 (4.8) |
| Â | No | 963 | 174 (18.1) | 37 (3.8) |
°Difficulty falling asleep | Yes | 203 | 61 (30.0) | 12 (5.9) |
| Â | No | 894 | 150 (16.8) | 31 (3.5) |
°Day-time tiredness | Yes | 245 | 73 (29.8) | 17 (6.9) |
| Â | No | 856 | 140 (16.4) | 26 (3.0) |
°Waking up during nights | Yes | 135 | 38 (28.1) | 9 (6.7) |
| Â | No | 959 | 174 (18.1) | 34 (3.5) |
aHypermobility score | Less than 6 | 83 | 13 (15.7) | 2 (2.4) |
| Â | 6 or more | 983 | 193 (19.6) | 39 (4.0) |
Frequency of exercise | 0–2 times a week | 587 | 114 (19.4) | 16 (2.7) |
|  | 3–4 times a week | 342 | 65 (19.0) | 14 (4.1) |
|  | 5–7 times a week | 150 | 32 (21.3) | 12 (8.0) |