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 language | English |
|---|---|
| Pages (from-to) | 1244-1250 |
| Number of pages | 7 |
| Journal | Journal of Investigative Dermatology |
| Volume | 126 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Jun 2006 |
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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 journal › Article
}
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 -