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Table 1 Baseline characteristics of population at risk

From: Insomnia and risk of chronic musculoskeletal complaints: longitudinal data from the HUNT study, Norway

  No insomnia Insomnia
No. of participants 13,113 316
No. of females (%) (missing = 0) 7185 (54.8) 181 (57.3)
Mean age, years (SD) (missing = 0) 43.4 (12.2) 44.5 (12.2)
Education ≥13 years, no (%) (missing = 167) 3680 (28.4) 108 (34.7)
Paid or self-employed workers, no (%) (missing = 113) 9947 (76.5) 211 (67.6)
Heavy physical activity ≥3 h/wb, no (%) (missing = 418) 1390 (10.9) 35 (11.6)
Daily smokers, no (%) (missing = 131) 3024 (23.3) 95 (30.4)
HADSc mean, (SD) (missing = 141) 6.2 (4.6) 12.7 (6.8)
Body mass index ≥25 (%) (missing =26) 7181 (54.9) 156 (49.5)
  1. Abbreviations: SD standard deviation, no number, h/w hours per week, HADS Hospital Anxiety and Depression Score