Table 3.
Comparison of principal components between occupation group, smoking group, drinking group, occupation + smoking + drinking group and non-exposure group
| Principal component | Occupation (n = 21) | Smoking (n = 7) | Drinking (n = 16) | Occupation + smoking + drinking (n = 12) | None (n = 41) |
|---|---|---|---|---|---|
| F1 | 4.46 ± 0.38 | 4.01 ± 0.59 | 4.18 ± 0.55 | 4.29 ± 0.25 | 4.38 ± 0.69 |
| F2 | 3.98 ± 0.29* | 3.96 ± 0.19* | 3.88 ± 0.20* | 3.65 ± 0.42 | 3.87 ± 0.21* |
| F3 | 1.68 ± 0.30 | 1.53 ± 0.39 | 1.42 ± 0.44 | 1.60 ± 0.26 | 1.73 ± 0.35 |
| Semen quality | 3.25 ± 0.22 | 3.11 ± 0.24 | 3.04 ± 0.30 | 3.04 ± 0.19 | 3.19 ± 0.37 |
Values are median ± SD. *P < 0.05 compared with the occupation + smoking + drinking group
F1: The first principal component. F2: The second principal component. F3: The third principal component