Figure 1.

Vitamin D concentrations of asthmatic patients.

Notes: Box and whiskers plots of vitamin D concentrations of normal controls (n = 30) and asthmatic patients (n = 39). The medians are indicated by a line inside each box, the 25th and 75th percentiles are indicated by the box limits, and the lower and upper error bars represent the 10th and 90th percentiles, respectively. The mean values were compared and the P values are indicated in the figure. Moderate asthmatics expressed lower vitamin D levels than mild asthmatics did. Mann–Whitney rank sum tests assessed the difference between mild and moderate asthmatic patients.