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Correlation between the levels of the studied elements in the hair of the case group and the control group
| Case group | Control group | ||||||
|---|---|---|---|---|---|---|---|
| As | Ca | Pb | As | Ca | Pb | ||
| Case group | As | – | 0.11 | 0.36* | |||
| Ca | 0.11 | – | −0.18 | ||||
| Pb | 0.36* | −0.18 | – | ||||
| Control group | As | – | −0.22 | −0.08 | |||
| Ca | −0.22 | – | − 0.15 | ||||
| Pb | −0.08 | −0.15 | – | ||||
Spearman correlation coefficient was used * statistically significant (p < 0.05)
