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Table 1 Demographic data, self-rated general health and health-related quality of life at baselinea

From: Risk factors for back pain in marines; a prospective cohort study

  Mean SD
Age (years) 23.6 4.3
Body weight (kg) 83.1 10.1
Body height (m) 1.83 0.06
Body mass index (kg/m2) 24.9 2.4
  % 95 % CI
Smoker
  No 90.1 84.7–93.9
  Occasionally 9.8 6.1–15.4
  Yes 0  
Non musculoskeletal co-morbidityb 4.3 2.1–8.6
General Health
  Good 95.6 91.3–97.9
  Less than good 4.4 2.1–8.8
  Mean SD
Health-related quality of life
  Physical component summaryc 54.4 4.6
  Mental component summaryc 53.0 6.0
  % 95 % CI
Military occupational function
  Infantry (Assault) 65.6 58.1–72.5
  Ranger 17.8 12.7–24.4
  CBC-Crewd 16.6 11.6–23.0
Grade
  Officer 22.1 16.4–29.1
  Soldier 77.9 70.9–83.6
  1. Reported with mean and standard deviation (SD) or percent and corresponding 95 % confidence interval (95 % CI)
  2. aBaseline characteristics (n = 163). Not including complete withdrawals (n = 29)
  3. bNon-musculoskeletal diagnosis, such as, cancer, cardiovascular or respiratory disease
  4. cNorm-based score (mean of 50 for the general Swedish population)
  5. dCBC-Crew; Combat Craft(Boat/Hovercraft) Crew