Figure 6

Comparison of phagocyte production of toxic oxygen radical molecules assessed as the per cent reduction of nitro blue tetrazolium among the groups with mild, moderate and severe persistent asthma and healthy control children. In A, B, C: under stimulation. In D, E, F: baseline. The data are expressed as the median, quartile and extreme values. The outlier data are indicated. The statistical differences are marked in the graphics and in text.