Table 1. Demographic and epidemiologic characteristics of the study population, N = 771.

Variable	N	%	95% CI
Median age ± IQR	16.4 ± 17	-	-
Age group
Pre-school-age children †	136	17.6%	15–20
School-age children‡	379	49.1%	45–53
Adolescents and adults •	256	33.2%	30–36
Female sex	428	55.5%	52–59
Urban	271	35.1%	31–38
Locality
Tartagal	316	41%	37–44
Orán	403	52%	49–56
Pichanal	52	7%	5–8
Improved sanitation *	232	30.1%	27–33
Improved water supply *	525	68.1%	65–71
Concrete or tile floor	362	47%	43–50
STH infection
Any STH	334	43.3%	40–47
S. stercoralis infection	203	26.3%	23–29
Hookworms infection	164	21.3%	18–24
A. lumbricoides infection	63	8.2%	6–10
T. Trichiura infection	11	1.4%	0.5–2.3

†: Preschool-age children (1 to 4 years old).

‡: School-age children (5 to 14 years old).

•: Adolescents and adults (≥ 15 years old).

*Categorization of water supply and sanitation as improved or unimproved is based in the WHO/UNICEF JMP definitions [26,27].