Table 3.
The characteristics of workers in the control and CB-exposed groups
| Variables | Control group (n = 104) | CB-exposed group (n = 81) | P |
|---|---|---|---|
| Age (years, mean ± SD) | 44.5 ± 5.94 | 45.9 ± 5.42 | 0.108a |
| BMI (kg/m2, mean ± SD) | 25.0 ± 3.30 | 25.1 ± 3.93 | 0.887a |
| Current smoker, yes/no (% yes) | 68/36 (65.4) | 56/25 (69.1) | 0.590b |
| Pack years of smoking | 17.87 ± 12.21 | 13.20 ± 8.92 | 0.019a |
| Never smoking (% never) | 31/73(29.8) | 22/59(27.2) | 0.693a |
| Alcohol user, yes/no (% yes)c | 15/87 (14.7) | 12/69 (14.8) | 0.984b |
| Working year (years, mean ± SD) | --- | 12.5 ± 11.07 | --- |
| Work shift before the physical test, at work/at rest (% at work) | 84/20 (80.8) | 72/9 (88.9) | 0.150b |
| Night shift within last week, yes/no (% yes) | 80/24 (76.9) | 65/16 (80.0) | 0.558b |
a t-test was used to compare values from both groups. Differences were considered significant when P < 0.05. bChi square test was used to compare values from both groups. cTwo missing values in the control group. Differences were considered significant when P < 0.05.