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Table 2 Relative risks (RR) of CMSC in different body regions at 11-year follow-up, according to insomnia status at baseline (316 with insomnia and 13,113 without). Outcome: type of CMSC vs. no CMSC

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

Type of CMSC No. of cases (prevalence) Partly a adjusted RR (95% CI) Fully b adjusted RR (95% CI)
CMSC screening
 No insomnia 4765 (36.3%) 1.00 1.00
 Insomnia 144 (45.6%) 1.25 (1.10–1.41) 1.16 (1.03–1.32)
CWMSC
 No insomnia 1338 (10.2%) 1.00 1.00
 Insomnia 62 (19.6%) 1.90 (1.53–2.35) 1.58 (1.26–1.98)
Neck
 No insomnia 1950 (14.9%) 1.00 1.00
 Insomnia 74 (23.4%) 1.58 (1.31–1.92) 1.34 (1.10–1.63)
Shoulder
 No insomnia 2314 (17.6%) 1.00 1.00
 Insomnia 89 (28.2%) 1.57 (1.32–1.86) 1.41 (1.18–1.68)
Upper back
 No insomnia 798 (6.1%) 1.00 1.00
 Insomnia 29 (9.2%) 1.69 (1.20–2.38) 1.40 (0.99–1.97)
Elbow
 No insomnia 642 (4.9%) 1.00 1.00
 Insomnia 25 (7.9%) 1.80 (1.24–2.60) 1.56 (1.07–2.27)
Lower back
 No insomnia 1822 (13.9%) 1.00 1.00
 Insomnia 69 (21.8%) 1.59 (1.30–1.95) 1.36 (1.11–1.68)
Hands/wrist
 No insomnia 1065 (8.1%) 1.00 1.00
 Insomnia 38 (12.0%) 1.57 (1.18–2.10) 1.35 (1.01–1.82)
Hips
 No insomnia 1412 (10.8%) 1.00 1.00
 Insomnia 60 (19.0%) 1.74 (1.40–2.17) 1.56 (1.24–1.95)
Knees
 No insomnia 1396 (10.6%) 1.00 1.00
 Insomnia 50 (15.8%) 1.53 (1.20–1.95) 1.34 (1.05–1.73)
Ankles/Feet
 No insomnia 924 (7.0%) 1.00 1.00
 Insomnia 40 (12.7%) 1.83 (1.39–2.42) 1.60 (1.19–2.14)
  1. Abbreviations: CMSC chronic musculoskeletal complaints, CWMSC chronic widespread musculoskeletal complaints, CI confidence interval
  2. a Adjusted for gender and age
  3. b Adjusted for gender, age, education, smoking, physical activity, Hospital Anxiety and Depression Score, Body Mass Index