At the first visit prior malaria treatment, malaria patients with G6PD deficiency (n = 28), compared to malaria patients with normal G6PD activity levels (n = 209), exhibited a significant decrease in the haemoglobin levels (11.03 ± 2.51 g/dl vs. 12.65 ± 1.97 g/dl; p = 0.003). Here, G6PD is linked to malaria.