Table 1. Demographic characteristics of the study population.

	Non-infected children (N = 37)	Infected children (N = 212)
Age (median)	8.48 ± 0.50	9.5 ± 0.21
Gender
Male	20	129
Female	17	83
Children in the LSES group	19	138
Children in the HSES group	18	74

LSES: low socioeconomic status, HSES: high socioeconomic status