Table 2. Comparison of trace element contents in toenails of males and females.
| Men | Women | P | |||||
|---|---|---|---|---|---|---|---|
| n | Median | IQR | n | Median | IQR | ||
| Ca (mg/kg) | 50 | 1090.0 | 763.0–1412.5 | 50 | 832.5 | 580.8–1120.0 | 0.013 |
| Cr (μg/kg) | 50 | 554.0 | 333.8–1247.5 | 50 | 793.0 | 356.0–1630.0 | 0.238 |
| Fe (mg/kg) | 50 | 14.0 | 9.2–25.7 | 50 | 11.8 | 7.8–20.4 | 0.133 |
| Co (μg/kg) | 50 | 10.6 | 4.5–22.2 | 50 | 6.6 | 4.1–15.3 | 0.183 |
| Ni (μg/kg) | 46 | 989.0 | 567.8–2032.5 | 43 | 887.0 | 360.0–1660.0 | 0.352 |
| Zn (mg/kg) | 50 | 107.7 | 96.6–115.0 | 50 | 105.0 | 95.9–120.0 | 0.858 |
| Se (μg/kg) | 49 | 571.0 | 521.5–625.0 | 50 | 582.5 | 543.8–670.3 | 0.361 |
| Hg (μg/kg) | 50 | 549.0 | 292.5–942.5 | 50 | 610.5 | 462.3–888.0 | 0.260 |
Abbreviations: calcium (Ca); chromium (Cr); iron (Fe); cobalt (Co); nickel (Ni); zinc (Zn); selenium (Se); mercury (Hg); IQR, interquartile range. The significance of the differences between sexes was performed by Mann-Whitney U test.