Table 1 Exposure characteristics of study sample (n = 520).
| Mean | SD | Median | Range (IQR) | |
|---|---|---|---|---|
| Age in years | 46.7 | 4.4 | 46.1 | 37.1–59.9 (43.1–50.1) |
| Number of jobs | 5.3 | 2.6 | 5 | 1–16 (3–7) |
| Length of service in years | 21.8 | 5.3 | 21.9 | 6.3–34.5 (18.7–25.3) |
| Cumulative respirable dust (mg.years/m3) | 8.2 | 2.88 | 8.0 | 0–22.68 (6.2–9.9) |
| Average intensity respirable dust (mg/m3) | 0.37 | 0.096 | 0.36 | 0–0.70 (0.31–0.45) |
| Cumulative respirable quartz (mg.years/m3) | 1.15 | 0.43 | 1.12 | 0–3.08 (0.84–1.42) |
| Average intensity respirable quartz (mg/m3) | 0.053 | 0.015 | 0.051 | 0–0.095 (0.033–0.064) |
SD, standard deviation; IQR, interquartile range.