Final logistic regression models for lung function impairment
| Logit coefficient (SE) | Odds ratio (95% CI) | |
|---|---|---|
| *MRC questionnaire.13 | ||
| The following variables were considered for model inclusion: age (>50 years), radiographic abnormalities, cumulative exposure (⩾10 fibres/y/cc), latency (⩾20 years), symptoms, and smoking (current or past). | ||
| Obstructive defect | ||
| Parenchymal and pleural abnormalities | 0.79 (0.17) | 2.20 (1.55 to 3.11) |
| Dyspnoea* | 0.53 (0.10) | 1.69 (1.39 to 2.06) |
| Current or past smoking | 0.44 (0.09) | 1.56 (1.30 to 1.86) |
| Age >50 years | 0.42 (0.13) | 1.52 (1.18 to 1.95) |
| Constant | −1.96 (0.07) | |
| Restrictive defect | ||
| Pleural abnormality | 1.18 (0.35) | 3.27 (1.63 to 6.56) |
| Dyspnoea* | 0.83 (0.21) | 2.29 (1.51 to 3.49) |
| Age >50 years | 0.32 (0.28) | 1.38 (0.79 to 2.40) |
| Current or past smoking | −0.70 (0.20) | 0.49 (0.33 to 0.74) |
| Constant | −3.47 (0.14) | |