Concentration of Zinc, Copper, Selenium, Manganese, and Cu/Zn Ratio in Hair of Children and Adolescents with Myopia

Table 1

Characteristics of control and myopic patients groups.

	Control group	Myopic patients
Age
Mean ± std  (range)	11.8 ± 4.7 (4, 17)	14.5 ± 2.5 (7, 17)	0.011
Min, med, max	4, 12, 17	7, 15, 17
Sex
Female/male	24/19	62/30	0.19

^aP value for Mann–Whitney U test. ^bP value for a test for two proportions. Statistically significant differences at 0.05 significance level.