Percent work time missed due to psoriasis

Percent work time missed due to psoriasis was evaluated using the Work Productivity and Activity Impairment Questionnaire: Specific Health Problem (WPAI-SHP), a 6-item questionnaire that measures effect of psoriasis on daily activity impairment, number of hours worked and the number of hours missed from work. Scores range from 0% to 100%. A decrease in percent work time missed indicates improvement.