The prevalence of decreased G6PD activity (<7.9 U/g Hb), G6PD deficiency by WHO TSS classification (<30% of adjusted male median), and possible G6PD variant prevalence were significantly different between sexes (p = 0.0009, <0.0001, and 0.0015, respectively). The gene discussed is GSTM1; the disease is G6PD deficiency.