G6PD and anemia (phenotype): After adjusting for baseline haemoglobin level and other significant predictors in this sample of 194 G6PD-deficient participants, a primaquine target dose of 0.25 mg/kg was associated with an additional drop in haemoglobin concentration of 0.53 g/dL (95% CI 0.17–0.89) and 3-fold increased odds of crossing the moderate anaemia threshold (< 10 g/dL; AOR 3.25, 95% CI 0.96–10.95) compared to the no primaquine group.