Figure I. Association between circulating IFN-γ and SMA (Hb>6.0 g/dL).
Association between IFN-γ levels and disease severity in parasitemic children with SMA (n=136) and non-SMA (n=126). Boxes represent the interquartile range, the line through the box is the median, and whiskers show 10th and 90th percentiles. Statistical significance was determined by the Mann-Whitney U test. Presence of SMA was significantly associated with lower IFN-γ levels relative to non-SMA (P=0.006).