Testing and reducing Skindex-29 using rasch analysis: Skindex-17

Tamar E C Nijsten, Francesca Sampogna, Mary Margaret Chren, Damiano D. Abeni

Research output: Contribution to journalArticle

Abstract

The Skindex is a well-studied dermatology-specific health-related quality of life (HRQOL) instrument. The objective of this study was to test Skindex-29 using Rasch analysis and, if necessary, to refine it so that it would fit this item response theory based model. The Skindex-29 of 454 Italian dermatological patients was subjected to Rasch analysis to investigate threshold order, differential item functioning (DIF), and item and overall fit to the model. The Skindex-29 did not fit the Rasch model (P0.05). Classical psychometric properties such as response distribution, item-rest correlation, item complexity, and internal consistency of the two subscales of Skindex-17 were at least adequate. The Skindex-17 is a Rasch reduced version of Skindex-29, with two independent scores that can be used in the measurement of HRQOL in dermatological patients.

Original languageEnglish
Pages (from-to)1244-1250
Number of pages7
JournalJournal of Investigative Dermatology
Volume126
Issue number6
DOIs
Publication statusPublished - Jun 2006

Fingerprint

Quality of Life
Differential Threshold
Testing
Dermatology
Psychometrics
Health

ASJC Scopus subject areas

  • Dermatology

Cite this

Testing and reducing Skindex-29 using rasch analysis : Skindex-17. / Nijsten, Tamar E C; Sampogna, Francesca; Chren, Mary Margaret; Abeni, Damiano D.

In: Journal of Investigative Dermatology, Vol. 126, No. 6, 06.2006, p. 1244-1250.

Research output: Contribution to journalArticle

Nijsten, Tamar E C ; Sampogna, Francesca ; Chren, Mary Margaret ; Abeni, Damiano D. / Testing and reducing Skindex-29 using rasch analysis : Skindex-17. In: Journal of Investigative Dermatology. 2006 ; Vol. 126, No. 6. pp. 1244-1250.
@article{155e42b82cfb46a3ad7021a5f0ccafef,
title = "Testing and reducing Skindex-29 using rasch analysis: Skindex-17",
abstract = "The Skindex is a well-studied dermatology-specific health-related quality of life (HRQOL) instrument. The objective of this study was to test Skindex-29 using Rasch analysis and, if necessary, to refine it so that it would fit this item response theory based model. The Skindex-29 of 454 Italian dermatological patients was subjected to Rasch analysis to investigate threshold order, differential item functioning (DIF), and item and overall fit to the model. The Skindex-29 did not fit the Rasch model (P0.05). Classical psychometric properties such as response distribution, item-rest correlation, item complexity, and internal consistency of the two subscales of Skindex-17 were at least adequate. The Skindex-17 is a Rasch reduced version of Skindex-29, with two independent scores that can be used in the measurement of HRQOL in dermatological patients.",
author = "Nijsten, {Tamar E C} and Francesca Sampogna and Chren, {Mary Margaret} and Abeni, {Damiano D.}",
year = "2006",
month = "6",
doi = "10.1038/sj.jid.5700212",
language = "English",
volume = "126",
pages = "1244--1250",
journal = "Journal of Investigative Dermatology",
issn = "0022-202X",
publisher = "Nature Publishing Group",
number = "6",

}

TY - JOUR

T1 - Testing and reducing Skindex-29 using rasch analysis

T2 - Skindex-17

AU - Nijsten, Tamar E C

AU - Sampogna, Francesca

AU - Chren, Mary Margaret

AU - Abeni, Damiano D.

PY - 2006/6

Y1 - 2006/6

N2 - The Skindex is a well-studied dermatology-specific health-related quality of life (HRQOL) instrument. The objective of this study was to test Skindex-29 using Rasch analysis and, if necessary, to refine it so that it would fit this item response theory based model. The Skindex-29 of 454 Italian dermatological patients was subjected to Rasch analysis to investigate threshold order, differential item functioning (DIF), and item and overall fit to the model. The Skindex-29 did not fit the Rasch model (P0.05). Classical psychometric properties such as response distribution, item-rest correlation, item complexity, and internal consistency of the two subscales of Skindex-17 were at least adequate. The Skindex-17 is a Rasch reduced version of Skindex-29, with two independent scores that can be used in the measurement of HRQOL in dermatological patients.

AB - The Skindex is a well-studied dermatology-specific health-related quality of life (HRQOL) instrument. The objective of this study was to test Skindex-29 using Rasch analysis and, if necessary, to refine it so that it would fit this item response theory based model. The Skindex-29 of 454 Italian dermatological patients was subjected to Rasch analysis to investigate threshold order, differential item functioning (DIF), and item and overall fit to the model. The Skindex-29 did not fit the Rasch model (P0.05). Classical psychometric properties such as response distribution, item-rest correlation, item complexity, and internal consistency of the two subscales of Skindex-17 were at least adequate. The Skindex-17 is a Rasch reduced version of Skindex-29, with two independent scores that can be used in the measurement of HRQOL in dermatological patients.

UR - http://www.scopus.com/inward/record.url?scp=33745532043&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33745532043&partnerID=8YFLogxK

U2 - 10.1038/sj.jid.5700212

DO - 10.1038/sj.jid.5700212

M3 - Article

C2 - 16543899

AN - SCOPUS:33745532043

VL - 126

SP - 1244

EP - 1250

JO - Journal of Investigative Dermatology

JF - Journal of Investigative Dermatology

SN - 0022-202X

IS - 6

ER -