Validation of the Dermatology Life Quality Index and the Work Productivity and Activity Impairment-Chronic Hand Dermatitis questionnaire in chronic hand dermatitis.

Reilly, Margaret C; Lavin, Philip T; Kahler, Kristijan H; Pariser, David M · J Am Acad Dermatol · 2003

rct · Level II

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Abstract

In a double-blind, randomized trial of 257 patients with chronic hand dermatitis, the validity, reproducibility, and responsiveness of the Dermatology Life Quality Index and the Work Productivity and Activity Impairment questionnaire were established, and the sample size required to detect meaningful differences between treatment groups was estimated.

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