Association between PTB on history or radiograph and different exposure metrics
| Exposure metric | Prevalence odds ratio | 95% CI | Prevalence odds ratio, scaled in IQR units | 95% CI |
|---|---|---|---|---|
| *Adjusted for age and smoking, n = 520. | ||||
| †(Adjusted for age, smoking, and silicosis >1/0 as classified by Reader 1, n = 520). | ||||
| ‡(Adjusted for age, smoking, and silicosis >1/0 as classified by Reader 2, n = 520). | ||||
| §[In non-silicotics, adjusted for age and smoking, n = 373]. | ||||
| ¶Units for average intensities of exposure are in micrograms to display more easily interpretable prevalence odds ratios. | ||||
| Length of service in years | 1.042* | 1.000 to 1.086 | 1.31 | 1.00 to 1.72 |
| (1.032)† | (0.990 to 1.077) | (1.24) | (0.94 to 1.63) | |
| (1.026)‡ | (0.984 to 1.070) | (1.19) | (0.90 to 1.57) | |
| [1.033]§ | [0.983 to 1.085] | [1.24] | [0.89 to 1.71] | |
| Cumulative respirable dust (mg.years/m3) | 1.107 | 1.036 to 1.183 | 1.45 | 1.14 to 1.85 |
| (1.093) | (1.021 to 1.170) | (1.38) | (1.08 to 1.77) | |
| (1.080) | (1.008 to 1.156) | (1.32) | (1.03 to 1.70) | |
| [1.097] | [1.010 to 1.191] | [1.40] | [1.04 to 1.89] | |
| Average intensity respirable dust (μg/m3)¶ | 1.003 | 1.001 to 1.005 | 1.48 | 1.13 to 1.95 |
| (1.003) | (1.001 to 1.005) | (1.45) | (1.10 to 1.91) | |
| (1.002) | (1.000 to 1.004) | (1.41) | (1.06 to 1.86) | |
| [1.003] | [1.000 to 1.005] | [1.51] | [1.07 to 2.12] | |
| Cumulative respirable quartz (mg.years/m3) | 1.950 | 1.257 to 3.024 | 1.47 | 1.14 to 1.89 |
| (1.811) | (1.158 to 2.831) | (1.41) | (1.09 to 1.82) | |
| (1.678) | (1.070 to 2.634) | (1.35) | (1.04 to 1.75) | |
| [1.863] | [1.080 to 3.215] | [1.43] | [1.05 to 1.99] | |
| Average intensity respirable quartz (μg/m3)¶ | 1.017 | 1.005 to 1.029 | 1.44 | 1.11 to 1.87 |
| (1.016) | (1.004 to 1.028) | (1.42) | (1.09 to 1.84) | |
| (1.015) | (1.003 to 1.028) | (1.39) | (1.07 to 1.81) | |
| [1.018] | [1.003 to 1.033] | [1.47] | [1.07 to 2.03] | |