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GIORNALE ITALIANO DI DERMATOLOGIA E VENEREOLOGIA

A Journal on Dermatology and Sexually Transmitted Diseases


Official Journal of the Italian Society of Dermatology and Sexually Transmitted Diseases
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Giornale Italiano di Dermatologia e Venereologia 2007 June;142(3):209-14

language: English

Validation of the Italian version of the Dermatology Life Quality Index

Baranzoni N. 1, Scalone L. 2,3, Mantovani L. G. 2,3, De Portu S. 3, Monzini M. S. 2, Giannetti A. 1

1 Department of Dermatology, Policlinic Hospital University of Modena and Reggio Emilia, Italy
2 Pharmacoeconomics Center Department of Pharmacological Sciences University of Milan, Milan, Italy
3 CIRF - Pharmacoeconomics Center University “Federico II”, Naples, Italy


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Aim. Aim of the study was to assess feasibility, validity and reliability of the Italian version of the Dermatology Life Quality Index (DLQI).
Methods. Twenty two patients (median age 35 years, from 18 to 64 years, 22.7% males) affected by skin diseases, were recruited at the Polyclinic Hospital in Modena and asked to complete the DLQI on 2 separate occasions (6 or 7 days between the 2 interviews).
Results. The scores given in the first interview to each question and the total scores were similar to those given in the second interview. Regarding feasibility, no missing answers were present. Concerning content validity, the frequency of ‘not relevant’ answers was 5.4% on the 1st and 7.7% on the 2nd interview. Reliability was tested in terms of internal consistency and test-retest reproducibility. Cronbach’s alpha coefficient for internal consistency was 0.787 on the 1st and 0.828 on the 2nd interview. Regarding reproducibility, the intraclass correlation coefficients for the total score was 0.983 (P<0.0001), and the method by Bland and Altman excluded the presence of biases in the score. The weighted kappa coefficient of agreement calculated for each question ranged from 0.644 (‘social and leisure’) to 0.984 (‘sport’).
Conclusion. The Italian version of the DLQI questionnaire is valid and reliable and can be used to evaluate Health Related Quality of Life in adult people affected by skin conditions. This instrument should be used to assist decisions on treatment and on health care resource allocation.

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