Fig 1.

Serum IP-10 levels at presentation with acute asthma. Data are summarized by box plots: boxes represent the 25th and 75th percentiles, the central line represents the median, and solid circles represent outliers. Subjects with acute virus-induced asthma are represented by colored boxes, and those with non–virus-induced acute asthma are represented by open boxes. Those with acute virus-induced asthma had significantly increased median serum IP-10 levels (604 pg/mL [interquartile range, 450-1536.3]) compared with those with non–virus-induced acute asthma (167 pg/mL [interquartile range, 141.5-168], P < .001). Comparison between groups was analyzed by using the Mann-Whitney U test.