When we compared distribution of Hb levels by diagnosis, we observed statistically significant lower Hb levels for children diagnosed with malaria (median 7.4 IQR: 5.7–9.0 versus median 8.8 IQR: 7.7–10.1; P < 0.0001) and a statistically significant increased Hb level for children diagnosed with GE/diarrhea (P < 0.0001) (Figure 2). This evidence concerns the gene GSTM1 and malaria.