Table 1. Socio-demographic characteristics, thyroid function markers and blood mercury concentrations of study participants stratified by mercury levels above occupational threshold.
| Variable |
Exposed N = 80(58.4) |
Non-Exposed N = 57(41.6) |
P-value |
|---|---|---|---|
| Age(years) | 26(22.25–35.75) | 30(24.0–39.0) | 0.0949M |
| ≤20 | 6(7.5) | 10(17.5) | 0.0005C |
| 21–39 | 59(73.8) | 34(59.7) | |
| 40–59 | 5(6.3) | 13(22.8) | |
| ≥60 | 9(11.3) | 0(0.00) | |
| Marital status | 0.1054C | ||
| Married | 65(81.3) | 39(68.4) | |
| Single | 15(18.7) | 18(31.6) | |
| Highest level of education | 0.0148C | ||
| None | 29(36.25) | 34(59.65) | |
| Primary | 29(36.25) | 7(12.28) | |
| Secondary | 22(27.5) | 16(28.07) | |
| Work duration (Years) | 8.0(7.0–9.0) | 4.0(3.0–4.0) | <0.0001M |
| ≥5 | 74(92.50) | 8(14.04) | <0.0001C |
| <5 | 6(7.50) | 49(85.96) | |
| T3(nmol/L) | 1.54 ± 0.93 | 2.46 ± 1.47 | <0.0001t |
| T4(ug/dl) | 5.44 ± 1.36 | 9.6 ± 2.87 | <0.0001t |
| TSH(mIU/L) | 1.70 ± 0.54 | 1.67 ± 0.90 | 0.7749t |
| Blood Mercury(ug/L) | 8.0(6.0–9.0) | 1.0(1.0–3.0) | <0.0001M |
Values are presented as frequency (percentages), Mean± SD, Median (IQR)
MMann Whitney U-test;
tstudent sample t-test;
cchi-square test