Skip to main content

Table 3 Crude and adjusted RR of recovery from PBP associated with levels of PA and BMI

From: The influence of self-reported leisure time physical activity and the body mass index on recovery from persistent back pain among men and women: a population-based cohort study

Exposure Men Women
  (n=632) (n=1204)
  Recovered a Not recovered Crude b Adjusted c Recovered a Not recovered Crude b Adjusted c
(n=142, 22%) (n=490, 78%) RR RR (n=245, 20%) (n=959, 80%) RR RR
n (%) n (%) (95% CI) (95% CI) n (%) n (%) (95% CI) (95% CI)
PA d         
 Sedentary e, j 30 (22) 106 (78) Ref. Ref. 43 (15) 252 (85) Ref. Ref.
 Low f 72 (22) 253 (78) 1.01 0.92 132 (22) 477 (78) 1.46 1.46
(0.69, 1.47) (0.64, 1.32) (1.06, 2.01) (1.06, 2.01)
 Moderate g 24 (24) 77 (76) 1.06 0.97 43 (23) 148 (77) 1.50 1.51
(0.66, 1.71) (0.61, 1.56) (1.02, 2.21) (1.02, 2.23)
 High h 16 (23) 54 (77) 1.03 0.91 27 (25) 82 (75) 1.66 1.67
(0.60, 1.75) (0.54, 1.54)   (1.07, 2.55) (1.08, 2.58)
BMI i         
 Overweight j 91 (22) 325 (78) Ref. Ref. 114 (19) 493 (81) Ref. Ref.
 Normal weight 51 (24) 165 (76) 1.07 1.03 131 (22) 466 (78) 1.09 1.10
    (0.79, 1.45) (0.77, 1.39)    (0.87, 1.37) (0.87, 1.38)
  1. Note: Risk ratio (RR) together with corresponding 95% confidence interval (95% CI). Men and women are reported separately.
  2. a Recovered from persistent back pain (PBP) = “No periods of considerably disturbing back pain lasting for 7 days or more, during the latest 5-year period”. Reported at follow-up in 2007.
  3. b Crude log-binomial regression model including PA and BMI.
  4. c Adjusted log-binomial regression model including PA, BMI, age and neck pain for men and PA, BMI and age for women.
  5. d PA: Self-reported regular leisure time physical activity the latest 12 months. Reported at baseline in 2002.
  6. e Sedentary: Mostly sedentary or low intensive activity like walking or cycling < 2 hours a week.
  7. f Low: Low intensive activity like walking or cycling ≥ 2 hours a week.
  8. g Moderate: At least 30 min activity, 1-2 sessions per week with activities like running, swimming, tennis, aerobics or similar.
  9. h High: At least 30 min activity, ≥ 3 sessions per week with activities like running, swimming, tennis, aerobics or similar.
  10. i BMI: Overweight; BMI ≥ 25, Normal weight; BMI < 25. Reported at baseline in 2002.
  11. j Reference category (RR = 1.0).