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Pictorial Representation of Illness and Self Measure (PRISM)A Novel Visual Instrument to Measure Quality of Life in Dermatological Inpatients
Beda Mühleisen, MD;
Stefan Büchi, MD;
Simone Schmidhauser;
Josef Jenewein, MD;
Lars E. French, MD;
Günther F. L. Hofbauer, MD
Arch Dermatol. 2009;145(7):774-780.
Objectives To validate the PRISM (Pictorial Representation of Illness and Self Measure) tool, a novel visual instrument, for the assessment of health-related quality of life in dermatological inpatients compared with the Dermatology Life Quality Index (DLQI) and the Skindex-29 questionnaires and to report qualitative information on PRISM.
Design In an open longitudinal study, PRISM and Skindex-29 and DLQI questionnaires were completed and HRQOL measurements compared.
Setting Academic dermatological inpatient ward.
Participants The study population comprised 227 sequential dermatological inpatients on admission.
Intervention Patients completed the PRISM tool and the Skindex-29 and DLQI questionnaires at admission and discharge.
Main Outcome Measures PRISM Self-Illness Separation (SIS) score; Skindex-29 and DLQI scores; and qualitative PRISM information by Mayring inductive qualitative context analysis.
Results The PRISM scores correlated well with those from the Skindex-29 ( = 0.426; P < .001) and DLQI ( = 0.304; P < .001) questionnaires. Between PRISM and Skindex-29 scores, the highest correlations were for dermatitis ( = 0.614) and leg ulcer ( = 0.554), and between PRISM and DLQI scores, the highest correlations were for psoriasis ( = 0.418) and tumor ( = 0.399). The PRISM tool showed comparable or higher sensitivity than quality of life questionnaires to assess changes in the burden of suffering during hospitalization. Inductive qualitative context analysis revealed impairment of adjustment and self-image as major aspects. Patients overall expected symptomatic and functional improvement. In patients with psoriasis and leg ulcers, many expected no treatment benefit.
Conclusions The PRISM tool proved to be convenient and reliable for health-related quality of life assessment, applicable for a wide range of skin diseases, and correlated with DLQI and Skindex-29 scores. With the PRISM tool, free-text answers allow for the assessment of individual information and potentially customized therapeutic approaches.
Author Affiliations: Departments of Dermatology (Drs Mühleisen, French, and Hofbauer and Ms Schmidhauser) and Psychiatry (Drs Büchi and Jenewein), University Hospital Zürich, Zürich, Switzerland.
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