Table 4 Comparison between risk factors for low back pain (LBP) for more than 30 days (LBP>30 days) and LBP of shorter duration (LBP⩽30 days) for men and women
LBP ⩽30 daysLBP >30 daysp Value§LBP ⩽30 daysLBP >30 daysp Value§
OR*† (95% CI)OR*† (95% CI)OR*‡ (95% CI)OR*‡ (95% CI)
Driving a car >2 h/day1.01 (1.00–1.02)1.01 (1.00–1.03)NS0.93 (0.87–1.01)1.04 (0.98–1.10)0.0082
Bending/twisting1.01 (1.00–1.02)1.04 (1.03–1.06)<0.00011.00 (0.98–1.03)1.04 (1.01–1.07)0.0431
Pushing/pulling/carrying heavy loads
  • NS, not significant.

  • *OR for one year of exposure.

  • †Adjusted for age, smoking, headache, social support at work.

  • ‡Adjusted for age, psychosomatic problems.

  • §Comparison between the two odds ratios (LBP for more then 30 days/LBP of shorter duration).

  • –, variable not in the model because associated with none of the types of LBP in the model (p⩾0.15) when confounders were taken into account.