G6PD and anemia (phenotype): In G6PD-deficient individuals given 0.25 mg/kg primaquine, severe anaemia was uncommon (between 1/100 and 1/1000) for individuals with baseline haemoglobin concentration ≥ 11 g/dL but common (1/10 to 1/100) for baseline haemoglobin concentrations between 9 and 10 g/dL.