The association of physically demanding work with role limitations due to physical health problems by age and gender, and the interaction of physically demanding work, age, and gender; odds ratios (OR) and their 95% confidence intervals (CI) from logistic regression analysis
| Role limitations due to physical health problems | ||||
|---|---|---|---|---|
| Men | Women | |||
| OR | 95% CI | OR | 95% CI | |
| *Covariate is physically demanding work, modelling is stratified for age and gender. Reference group (OR = 1.00) is those not in physically demanding work in the same gender and age group. | ||||
| †Covariate is the interaction of physically demanding work and age, modelling is stratified for gender. Main effects of age and physically demanding work were adjusted for. The OR is interpreted as mean effect of 5 years of age in physically demanding work when compared to those not in physically demanding work in the same gender. | ||||
| ‡Covariate is the interaction of physically demanding work, gender, and age, applied in single unstratified model. Main effects of physically demanding work, age, and gender, and interaction effects of age and gender, age and physically demanding work, and gender and physically demanding work were adjusted for. The OR is interpreted as mean effect of 5 years of age in physically demanding work in women when compared to women not in physically demanding work and all men. | ||||
| Modelling strategy 1* | ||||
| Physically demanding work by age year | ||||
| 40 | 2.37 | 1.21 to 4.63 | 1.53 | 1.16 to 2.02 |
| 45 | 2.86 | 1.51 to 5.43 | 1.35 | 1.03 to 1.78 |
| 50 | 1.51 | 0.79 to 2.89 | 1.75 | 1.34 to 2.29 |
| 55 | 2.02 | 1.08 to 3.77 | 1.81 | 1.41 to 2.32 |
| 60 | 1.28 | 0.56 to 2.93 | 2.27 | 1.57 to 3.29 |
| Modelling strategy 2† | ||||
| Physically demanding work × age, 5 years | 0.86 | 0.69 to 1.08 | 1.10 | 1.00 to 1.21 |
| Modelling strategy 3‡ | ||||
| Physically demanding work × gender × age, 5 years | 1.00 | 1.27 | 1.00 to 1.63 | |