Table 1. The characteristics of subjects in the non-DEE-exposed and DEE-exposed workers.
| Variable | Non-DEE-exposed workers (n=127) |
DEE-exposed workers (n=137) |
p-value |
|---|---|---|---|
| Age (yr, mean±SD)* | 31.91±11.15 | 31.99±8.60 | 0.948 |
| Height (cm, mean±SD)* | 171.12±5.79 | 171.49±5.41 | 0.591 |
| Weight (kg, mean±SD)* | 69.57±13.94 | 72.29±10.49 | 0.073 |
| BMI (kg/m2, mean±SD)* | 23.74±4.43 | 24.58±3.40 | 0.084 |
| Current smokers, yes/no (% yes)# | 61/66 (48.0) | 81/56 (59.1) | 0.084 |
| Alcohol use, yes/no (% yes) # | 83/44 (65.4) | 89/48 (65.0) | 1.000 |
| DEE exposure years (yr, median(Q1–Q3)) | — | 8.50 (5.40–9.60) | — |
DEE: diesel engine exhaust; BMI: body mass index. *t-test was used to compare values from both groups. #Chi square test was used to compare values from both groups. Differences were considered significant when p<0.05.