Figure 4. Significant quality of live improvement of blue light-treatment.

A+B, At the indicated time points, patients were asked to quantify their degree of itching and sleeplessness on an analogous scale from 0 = none to 10 = severe. C, Prior to treatment, on day 15 and after 3 and 6 months, each patient completed the Dermatology life quality index (DLQI) consisting of 10 questions which are scored between 0 = not relevant and 4 = very much affected. Data are presented as cumulative data from all 10 questions. A–C, All data are shown as mean+SEM, * = p≤0.05, and *** = p≤0.002 as compared to d0.