GSTM1 and schistosomiasis: MI = multiple infection; SI = single infection; NI = no infection; H = helminth; M = malaria; P = intestinal protozoa; TB = tuberculosis; HIV = human immunodeficiency virus; Hb = hemoglobin; SH = S. haematobium; HW = hookworm; HN = H. nana; TT = T. trichiura; AL = A. lumbricoides; PF = P. falciparum; SCH = schistosomiasis; STH = soil-transmitted helminths; IPs = Intestinal parasites; BMI = body mass index; S = significant; NS = not significant; y/o = years old; OR = odds ratio; AOR = adjusted odds ratio; PR = prevalence ratio; MD = mean difference.