Table 1 General characteristic of study subjects.
| Hepatic injury (n = 28) | Normal (n = 412) | All (n = 440) | |
|---|---|---|---|
| Age (years)*† | 42.5 (23–62) | 39 (17–64) | 39 (17–64) |
| Duration of employment (months)*† | 1.5 (0.6–5.9) | 9.4 (0.3–30.5) | 7.5 (0.3–30.5) |
| Body mass index (kg/m2)* | 25 (18.5–33.7) | 23 (15.2–31.5) | 23 (15.2–33.7) |
| AST before placement (IU/l)* | 21 (15–39) | 19 (10–63) | 19 (10–63) |
| ALT before placement (IU/l)* | 19 (6–54) | 17(5–138) | 17 (5–138) |
| GGT before placement (IU/l)* | 12.5 (5–155) | 13 (3–229) | 13 (3–229) |
| Gender (male/female) | 16/12 | 193/219 | 209/231 |
| Alcohol intake (drinking/not drinking)† | 9/19 | 228/184 | 237/203 |
| Smoking (smoker/non‐smoker) | 7/20 | 117/250 | 124/270 |
*Results expressed as median (range).
†Significant difference between hepatic injury group and normal group (p<0.05).