.png){kind=icon}
.png){kind=icon}
Return
The reduced impact of psoriasis questionnaire has good psychometric properties in Italian patients
.png){kind=icon}
PRE
AI
T
F
R
D
DOI：10.1159/000107629.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Background: A recent refinement study suggested that a Rasch reduced version of the Impact of Psoriasis Questionnaire ( IPSO) of 11 items most adequately assessed the psychosocial impact of US psoriasis patients. Objective: To test whether the IPSO would also behave well in a different population that varies culturally, demographically, and in disease severity. Methods: The psychometric properties of the IPSO, using classical test and item response theory ( Rasch analysis), were assessed in 805 Italian psoriasis patients. Results: Patients with more severe psoriasis reported significantly higher impact on their HRQOL (p < 0.001) and the IPSO correlated well with the Skindex-29 (r = 0.74) confirming its validity. The response distribution was adequate for all items, except item 9. The Cronbach's alphas were excel lent and the high item-rest correlations confirmed its homogeneity. Principal component analysis demonstrated one dominant factor with an eigenvalue of 4.47 (items loading > 0.40). Overall, the 11 IPSO items fitted the Rasch model (p = 0.07) and all items demonstrated a logical threshold order. Of the 11 items, 2 items showed significant individual misfit and only 1 item demonstrated significant differential item functioning for age but none for gender or global severity score. Conclusion: The 11-item IPSO is a valuable psoriasis-specific HRQOL instrument in different populations. Copyright (C) 2007 S. Karger AG, Basel.
Keywords:
health-related quality of life
psoriasis
impact of psoriasis questionnaire
AI Summary
Key information extracted from the uploaded paper, including a brief overview, abstract, background, key highlights, visual analysis, and future outlook.
Journal
D
IF:
2.7
Papers:
5.0K
Citations:
6.2K
Organization
No organization information available
Cited Papers