A multi-item Physician Global Assessment scale to assess psoriasis disease severity: validation based on four phase III tofacitinib studies.
Kristina Callis DuffinAndrew G BushmakinJoseph C CappelleriLotus MallbrisCarla M MamoloPublished in: BMC dermatology (2019)
Consistent with previous findings from a phase II study, these results indicate that this PGA is a valid, reliable instrument for evaluating disease severity in clinical studies of psoriasis.