Demographic data for the Cr workers and control group
| Variables | Cr worker (n=50) n (%) | Control group (n=20) n (%) | p value |
|---|---|---|---|
| *Mean±SD. | |||
| †p value was calculated by Fisher’s exact test. | |||
| Gender | 0.390 | ||
| Male | 33 (66.0) | 11 (55.0) | |
| Female | 17 (34.0) | 9 (45.0) | |
| Age (y) | 36.5±12.7* | 31.0±5.7 | 0.014 |
| BMI (kg/m2) | 22.7±3.9 | 22.3±3.2 | 0.714 |
| Education (y) | 0.019 | ||
| <6 | 17 (34.0) | 0 (0.0) | |
| 7–9 | 16 (32.0) | 0 (0.0) | |
| 10–12 | 14 (28.0) | 2 (10.0) | |
| >13 | 3 (6.0) | 18 (90.0) | |
| Work duration (mth) | 75.6±73.1* | 48.5±20.4 | 0.108 |
| Works with electroplating tank | 19 (38.8) | 0 (0.0) | 0.001 |
| Smoking (pack year) | 21 (42.0) | 3 (15.0) | 0.032 |
| 5.67±5.94 | 4.17±2.89 | 0.676 | |
| Alcohol consumption | 0.005 | ||
| Usually | 6 (12.0) | 0 (0.0) | |
| Sometimes | 14 (28.0) | 13 (65.0) | |
| Seldom/never | 30 (60.0) | 7 (35.0) | |
| Common cold | 7 (24.1) | 0 (0.0) | 0.032† |