Occupational factors and smoking at baseline as predictors of health status and quality of life at follow up
| Risk factors at baseline | Health status and quality of life at follow up | ||||||
|---|---|---|---|---|---|---|---|
| Risk factor | Frequency n (%) | SF-12 physical component score | SF-12 mental component score | Respiratory quality of life score | |||
| Mean (SE) | p value | Mean (SE) | p value | Mean (SE) | p value | ||
| SE, standard error; VGDF, exposure to vapours, gas, dust, or fumes; work disability, respiratory related work disability. | |||||||
| Multivariate model includes the variables shown as well as smoking status, age by category, gender, and race (see table 1 for variable definitions). | |||||||
| Higher SF-12 scores reflect better health status; higher quality of life scores reflect poorer quality of life. | |||||||
| Occupational risk factors | |||||||
| No disability or exposure (referent) | 86 (37%) | 41.1 (1.2) | NA | 47.8 (1.0) | NA | 5.0 (0.5) | NA |
| VGDF exposure, no work disability | 90 (38%) | 37.1 (1.2) | 0.02 | 47.2 (1.0) | 0.66 | 6.8 (0.5) | 0.01 |
| Work disability, no exposure | 20 (9%) | 30.7 (2.5) | <0.001 | 45.7 (2.1) | 0.36 | 10.3 (1.0) | <0.001 |
| Work disability and VGDF exposure | 38 (16%) | 29.1 (1.9) | <0.001 | 47.0 (1.5) | 0.68 | 12.0 (0.8) | <0.001 |
| Cigarette smoking status | |||||||
| Never (referent) | 42 (18%) | 37.5 (1.8) | NA | 49.3 (1.5) | NA | 8.2 (0.8) | NA |
| Former | 117 (50%) | 32.1 (1.1) | 0.01 | 48.4 (0.9) | 0.6 | 8.6 (0.4) | 0.57 |
| Current | 75 (32%) | 33.9 (1.4) | 0.09 | 43.1 (1.1) | 0.001 | 8.7 (0.6) | 0.52 |