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Trace element levels (ppm) in exposed to cigarette smoking (ETS) and non-exposed to cigarette smoking (NETS) groups. Data are presented as mean ± SD.
| Elements | ETS (n = 20) | NETS (n = 20) |
|---|---|---|
| Iron | 3.94 ± 1.52 | 4.63 ± 2.73 |
| Zinc | 1.88 ± 1.30 | 2.75 ± 3.30 |
| Copper | 1.64 ± 0.59 | 1.42 ± 1.12* |
| Selenium | 0.55 ± 0.08 | 0.51 ± 0.14 |
* indicates significant differences at p < 0.05.
