Table 2 Comparison of the blood tests of the mild and moderate/severe groups

Vitamin A (mg/L)

0.35 ± 0.08

0.49 ± 2.17

0.105

0.917

Vitamin D (ng/mL)

26.05 ± 8.79

26.85 ± 9.25

−1.119

0.264

Vitamin E (mg/L)

7.94 ± 2.79

7.96 ± 2.60

−0.347

0.729

Cu (μg/dl)

116.52 ± 26.94

117.28 ± 26.68

−0.114

0.909

Zn (mg/L)

4.63 ± 0.78

4.55 ± 0.75

0.932

0.352

Fe (mg/L)

442.22 ± 42.88

464.54 ± 40.20

−0.930

0.353

Pb (μg/dl)

2.58 ± 1.08

3.25 ± 1.89

−3.489

0.001*