Desired Improvement Tool (DIT): A tool to assess desire for improvement in psoriasis patients. (2nd January 2016)

• Record Type: Journal Article
• Authors: Zaghi, Daniel; Weir, Charlene; Ying, Jian; Carlin, Christopher; Greene, Tom; DeShazo, Rosemary; Callis Duffin, Kristina; Krueger, Gerald G.
• Is Part Of: Journal of dermatological treatment. Volume 27(2016)Supplement 1
• Page Start: 27
• Page End: 30
• Publication Date: 2016-01-02
• Subjects: Desired improvement -- patient reported outcome -- psoriasis; Skin -- Diseases -- Treatment -- Periodicals; Skin Diseases -- drug therapy -- Periodicals; Skin Diseases -- therapy -- Periodicals; 616.5
• DOI: 10.3109/09546634.2015.1050351
• Languages: English
• ISSNs: 0954-6634

Abstract

Abstract: No validated instrument exists to measure desire for improvement in psoriasis patients. To address this void, we conducted a single-center longitudinal study of 268 moderate-to-severe psoriasis patients to psychometrically validate the Desired Improvement Tool (DIT). The DIT is a single-item instrument scored 0–5 by the patient. A 0 indicates the patient is satisfied with disease level and does not desire further treatment. A 5 indicates a large amount of improvement is desired. The DIT demonstrated high test–retest reliability (Spearman, r = 0.97). Predictive and construct validity were moderate-to-high: r = 0.70 for BSA, 0.67 for PASI, and 0.56 for PGA and r = 0.67 for Life Quality Assessment (LQA), respectively. A sensitivity analysis revealed the DIT responded to changes in BSA. As a psychometrically valid tool, the DIT may guide clinical management of psoriasis patients by capturing an important clinical construct in an expedient and quantifiable manner.