Validation of psoriasis disability index (PDI) questionnaire Sinhala version

Autor: C Gunasekera, G. Liyanage, S Imafuku, S Lekamwasam, Achala Liyanage, J Akarawita, V. De Silva
Rok vydání: 2021
Předmět:
Zdroj: Archives of Dermatological Research. 314:61-69
ISSN: 1432-069X
0340-3696
DOI: 10.1007/s00403-021-02210-5
Popis: Psoriasis is a chronic inflammatory dermatosis with significant physical and psychological impact leading to negative influence on the quality of life among patients with psoriasis. Other than the disease characteristics many external factors could operate in South Asian context. Lack of a reliable disease-specific instrument prevents objective estimation and monitoring of disability in patients with psoriasis and hence we aim to validate assess the psychometric properties of the Sinhala version of PDI. A cross-sectional study conducted at dermatology clinic at a tertiary care National Hospital in Sri Lanka. Patients with psoriasis and on therapy at least 4 weeks prior to enrollment, aged more than 18 years, were included while those with already diagnosed psoriatic arthritis and/or nail psoriasis alone without any skin involvement and generalized pustular psoriasis de novo were excluded. All patients were examined by dermatologist to obtain disease characteristics. The reliability was assessed by internal consistency using Cronbach’s α and item-total correlation. Convergent validity was measured with the known groups. Of 199 patients studied, the PDI Sinhala version showed Cronbach’s α of 0.86 (all 15 items) and ranged from 0.57 to 0.77 for subscales. PDI score and Dermatology Life Quality Index (DLQI) showed good correlation of coefficient 0.76 (p
Databáze: OpenAIRE
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