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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).

From: Risk factors for development of non-specific musculoskeletal pain in preteens and early adolescents: a prospective 1-year follow-up study

Variables Category Total number Non-traumatic musculoskeletal pain, N (%) Traumatic musculoskeletal pain, N (%)
Sex Male 542 86 (15.9) 24 (4.4)
  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)
  No 867 150 (17.3) 31 (3.6)
°Abdominal pain Yes 118 37 (31.4) 5 (4.2)
  No 980 178 (18.2) 38 (3.9)
°Feeling sad/down Yes 126 38 (30.2) 6 (4.8)
  No 963 174 (18.1) 37 (3.8)
°Difficulty falling asleep Yes 203 61 (30.0) 12 (5.9)
  No 894 150 (16.8) 31 (3.5)
°Day-time tiredness Yes 245 73 (29.8) 17 (6.9)
  No 856 140 (16.4) 26 (3.0)
°Waking up during nights Yes 135 38 (28.1) 9 (6.7)
  No 959 174 (18.1) 34 (3.5)
aHypermobility score Less than 6 83 13 (15.7) 2 (2.4)
  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)
  1. °Symptoms reported in a frequency of at least once a week.
  2. aUsing Beighton test. A child was categorized as hypermobile if his/her hypermobility score was six or more.