Table 1. The demographic Information of the study groups.
| Groups | n | Age (yr) (Mean ± SD) |
Work history (yr) (Mean ± SD) |
BMI (kg/m2) (Mean ± SD) |
Number of smokers (%) |
Number of married people (%) |
|---|---|---|---|---|---|---|
| Welder | 27 | 31.18 ± 4.06 | 7.04 ± 4.64 | 24.47 ± 2.92 | 7 (25.92) | 24 (88.88) |
| Control | 30 | 34.45 ± 7.11 | 8.61 ± 4.70 | 26.11 ± 4.72 | 4 (13.33) | 26 (86.66) |
| p value | - | 0.053 | 0.228 | 0.149 | 0.248 | 0.597 |
| Ferroalloy smelter | 31 | 34.88 ± 5.63 | 9.15 ± 4.38 | 27.06 ± 4.15 | 7 (22.58) | 28 (90.32) |
| Control | 30 | 34.45 ± 7.11 | 8.61 ± 4.70 | 26.11 ± 4.72 | 4 (13.33) | 26 (86.66) |
| p value | - | 0.789 | 0.638 | 0.404 | 0.384 | 0.155 |
*Differences between case and control groups, Student’s t-test, p<0.05; statistically significant