Background: It is unknown how the quality of life (QOL) is affected in patients with pityriasis rosea (PR), and whether it is related to rash severity.
Methods: We constructed a valid and reliable Cantonese version of the Dermatology Life Quality Index (DLQI). We recruited patients with PR, with atopic dermatitis and with acne vulgaris, and controls of the same sex and comparable age. We applied the DLQI and the Pityriasis Rosea Severity Score (PRSS) to the patients with PR, the DLQI and the SCORing Atopic Dermatitis Index (SCORAD) to the controls with atopic dermatitis, and the DLQI and the Leeds Acne Grading System (LAGS) to the controls with acne vulgaris.
Results: Total DLQI scores of the 22 patients with PR (mean: 6.36, SD: 5.79) were significantly lower than those of the 22 controls with atopic dermatitis (mean: 12.00, SD: 5.38) (P = 0.021), but were insignificantly different from those of the 22 controls with acne vulgaris (mean: 6.86, SD: 4.53) (P = 0.57). Correlation between the total DLQI and PRSS scores was weak (gamma(s) = +0.19) and insignificant (P = 0.40). All six DLQI parameters were insignificantly correlated with the PRSS scores. In contrast, the total DLQI scores and most of the DLQI parameters were strongly correlated with the rash severity scores for the control subjects. Significantly more patients with PR have concerns regarding disease etiology and infectivity.
Conclusions: The QOL of the patients with PR was significantly less affected than that for the patients with atopic dermatitis, but was insignificantly different from the patients with acne vulgaris. Unlike atopic dermatitis and acne vulgaris, the effects on the QOL in PR are insignificantly correlated with rash severity. These results bear important implications on clinical management.