Table 2.
Prevalence of respiratory symptoms by personal characteristics among Australian miners
| Characteristic | Respiratory symptom | |||
|---|---|---|---|---|
| Cough | Phlegm | Breathlessness | Wheeze | |
| Gender, n (%) | ||||
| Female | 149 (12.3) | 85 (7.0) | 122 (10.1) | 136 (11.2) |
| Male | 1759 (14.7) | 1319 (11.0) | 1098 (9.2) | 1552 (13.0) |
| Pa | 0.025 | 0.001 | 0.337 | 0.089 |
| Occupation, n (%) | ||||
| Manager | 405 (15.3) | 254 (9.6) | 245 (9.2) | 376 (14.2) |
| Surface production | 595 (13.9) | 417 (9.7) | 379 (8.8) | 568 (13.3) |
| Underground mining | 908 (14.6) | 733 (11.8) | 596 (9.6) | 744 (14.9) |
| Pa | 0.263 | 0.001 | 0.460 | 0.008 |
| Shift length, n (%) | ||||
| 10 h | 431 (14.6) | 342 (11.6) | 297 (10.1) | 411 (14.0) |
| 12 h | 1477 (14.4) | 1062 (10.4) | 923 (9.0) | 1277 (12.5) |
| P a | 0.826 | 0.063 | 0.089 | 0.040 |
| Smoking status, n (%) | ||||
| Yes | 1189 (26.9) | 821 (18.6) | 550 (12.4) | 875 (19.8) |
| No | 719 (8.2) | 583 (6.7) | 670 (7.7) | 813 (9.3) |
| Pa | < 0.001 | < 0.001 | < 0.001 | < 0.001 |
afrom Chi-squared test