Potential risk factors | Low back pain in 1969 | Low back pain in 1970–92 | Low back pain in 1993 | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Actual study group PR | Estimated full study group weighted PR | Actual study group CIR | Estimated full study group weighted CIR | Actual study group PR | Estimated full study group weighted PR | |||||||||
Exposure | Health | Exposure +health | Exposure | Health | Exposure +health | Exposure | Health | Exposure +health | ||||||
Women: | ||||||||||||||
Heavy physical load | 1.4 | 1.4 | 1.4 | 1.4 | 1.1 | 1.1 | 1.2 | 1.1 | 1.0 | 0.9 | 1.0 | 1.0 | ||
High mental load | 0.8 | 1.1 | 1.0 | 1.1 | 1.4 | 1.2 | 1.4 | 1.4 | 1.1 | 0.9 | 1.1 | 1.1 | ||
Monotonous work | 1.6 | 1.5 | 1.6 | 1.7 | 1.1 | 1.3 | 1.1 | 1.2 | 0.9 | 0.9 | 0.8 | 0.9 | ||
Men: | ||||||||||||||
Heavy physical load | 1.4 | 1.3 | 1.3 | 1.4 | 1.4 | 1.5 | 1.5 | 1.4 | 1.1 | 1.3 | 1.2 | 1.2 | ||
High mental load | 1.2 | 1.2 | 1.3 | 1.3 | 1.0 | 1.0 | 1.0 | 0.9 | 1.1 | 1.0 | 1.0 | 1.0 | ||
Vibrations | 0.9 | 0.9 | 0.9 | 0.9 | 1.4 | 1.4 | 1.3 | 1.4 | 1.3 | 1.5 | 1.4 | 1.4 | ||
Monotonous work | 0.8 | 0.7 | 0.9 | 0.9 | 1.0 | 1.0 | 0.9 | 0.9 | 1.5 | 1.6 | 1.4 | 1.4 |
PR=prevalence ratio, adjusted for age; CIR=cumulative incidence ratio, adjusted for age.