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. 2015 May-Jun;90(3):358-62.
doi: 10.1590/abd1806-4841.20153684. Epub 2015 Jun 1.

Translation, cross-cultural adaptation and validation of the vitiligo-specific health-related quality of life instrument (VitiQoL) into Brazilian Portuguese

Juliana Catucci Boza  1 , Roopal V Kundu  2 , Amanda Fabbrin  1 , Roberta Horn  1 , Natalia Giongo  1 , Tania Ferreira Cestari  1
Affiliations

Translation, cross-cultural adaptation and validation of the vitiligo-specific health-related quality of life instrument (VitiQoL) into Brazilian Portuguese

Juliana Catucci Boza et al. An Bras Dermatol. 2015 May-Jun.

Abstract

Background: Vitiligo, although asymptomatic, highly compromises patients' quality of life (QoL). Therefore, an adequate evaluation of QoL is essential.

Objectives: Translation, cultural adaptation and validation of VitiQol (Vitiligo-specific health-related quality of life instrument) into Brazilian Portuguese.

Methods: The study was conducted in two stages; the first stage was the translation and cultural/linguistic adaptation of the instrument; the second stage was the instrument's validation.

Results: The translated VitiQol showed high internal consistency (Cronbach alpha = 0.944) and high test-retest reliability and intraclass correlation coefficient=0.95 (CI 95% 0.86 - 0.98), p<0.001. There was no statistically significant difference between the means of the first completion of the VitiQoL questionnaire and the retest, p = 0.661. There was a significant correlation between VitiQoL and DLQI (r = 0.776, p <0.001) and also between VitiQoL-PB and subjects' assessment of the severity of their disease (r = 0.702, p <0.001).

Conclusions: The impact of vitiligo on the QoL of Brazilian patients can be assessed by a specific questionnaire.

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Conflict of interest statement

Conflict of Interest: None.

Figures

GRAPH 1
GRAPH 1
Clinical and demographic data Bland and Altman’s graph showing agreement between test and retest scores. The solid line shows the difference between the means of the test and the retest; the dotted line shows the 95% limits of agreement (mean difference ± 1.96SD)
FIGURE 1
FIGURE 1
VitiQoL PB Reproduced with permission of the authors ALL RIGHTS RESERVED © Lilly E, Kundu RV 2012. Any unauthorized use or reproduction of this document is strictly prohibited.
GRAPH 2
GRAPH 2
Correlation between VitiQoL-PB, DLQI and question 16 of VitiQoL (self-reported severity of vitiligo)
See this image and copyright information in PMC

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