Final logistic regression models for radiographic abnormalities
| Logit coefficient (SE) | Odds ratio (95% CI) | |
|---|---|---|
| *Compared to Group I. | ||
| The following variables were considered for model inclusion: age (>50 years), group of exposure, obstructive and restrictive impairments, cumulative exposure (⩾10 fibres/y/cc), latency (⩾20 years), and smoking (current or past). | ||
| Parenchymal abnormalities | ||
| Age >50 years | 1.86 (0.25) | 6.47 (3.89 to 10.75) |
| Cumulative exposure ⩾10 fibres/y/cc | 1.10 (0.28) | 3.02 (1.72 to 5.31) |
| Current or past smoking | 0.39 (0.27) | 1.48 (0.86 to 2.56) |
| Constant | −5.30 (0.29) | |
| Pleural abnormalities | ||
| Age >50 years | 1.24 (0.24) | 3.48 (2.16 to 5.60) |
| Cumulative exposure ⩾10 fibres/y/cc | 0.36 (0.24) | 1.44 (0.89 to 2.33) |
| Current or past smoking | 0.31 (0.21) | 1.36 (0.90 to 2.06) |
| Group II* | −0.70 (0.28) | 0.49 (0.28 to 0.86) |
| Group III* | −1.10 (0.36) | 0.33 (0.16 to 0.67) |
| Constant | −3.24 (0.38) | |
| Pleural and/or parenchymal abnormalities | ||
| Age >50 years | 1.37 (0.20) | 3.95 (2.66 to 5.87) |
| Group II* and cumulative exposure ⩾10 fibres/y/cc | 0.75 (0.44) | 2.12 (0.88 to 5.10) |
| Group III* and current or past smoking | 0.73 (0.37) | 2.07 (0.99 to 4.30) |
| Cumulative exposure ⩾10 fibres/y/cc | 0.19 (0.31) | 1.21 (0.66 to 2.22) |
| Current or past smoking | 0.09 (0.21) | 1.10 (0.72 to 1.68) |
| Group II* | −1.24 (0.45) | 0.29 (0.12 to 0.69) |
| Group III* | −1.66 (0.42) | 0.19 (0.08 to 0.45) |
| Constant | −2.62 (0.39) | |