Short-form development of the specific module of the QLICD-CRF(V2.0) for assessing the quality of life of patients with chronic renal failure

Background A short instrument would enhance the viability of a study. Therefore, we aimed to shorten the specific module (SPD-10) of the Quality of Life Instrument for Chronic Diseases - Chronic Renal Failure (QLICD-CRF) for assessing the quality of life of patients with chronic renal failure. Metho...

Full description

Saved in:
Bibliographic Details
Published in:BMC medical research methodology 2022-11, Vol.22 (1), p.1-289, Article 289
Main Authors: Xiao, Zhengqin, Liu, Yuxi, Fong, Daniel Yee-Tak, Huang, Xinping, Weng, Min, Wan, Chonghua
Format: Article
Language:English
Subjects:
Analysis
Chronic illnesses
Chronic kidney failure
Classical test theory
Development and progression
Generalizability theory
Integer programming
Item response theory
Medical research
Optimal test assembly
Quality of life
Research methodology
Scale reduction
Validity
Variance analysis
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Background A short instrument would enhance the viability of a study. Therefore, we aimed to shorten the specific module (SPD-10) of the Quality of Life Instrument for Chronic Diseases - Chronic Renal Failure (QLICD-CRF) for assessing the quality of life of patients with chronic renal failure. Methods The 10-item SPD-10 was self-administered to 164 patients with chronic renal failure. A shortened form was first obtained by a tandem use of the classical test theory (CTT), the generalizability theory (GT), and the item response theory (IRT). In addition, we also shortened the SPD-10 by the Optimal Test Assembly (OTA). Results Both the tandem use of GT, CTT and IRT, and the OTA derived the same 7-item shortened version (SPD-7). It included items CRF1, CRF2, CRF3, CRF4, CRF6, CRF8, and CRF9 of the SPD-10. The SPD-7 had a Cronbach alpha of 0.78. The correlation coefficients of its total and factor scores with those of the SPD-10 were 0.96 and 0.98, respectively. Confirmatory factor analysis confirmed the unidimensional structure of the SPD-7, with the comparative fit index=0.96, the Tucker-Lewis index=0.94, and the root mean square error of approximation=0.09. Conclusion The short-form SPD-7 is reliable and valid for assessing the impact of clinical symptoms and side effects on the quality of life of patients with chronic renal failure. It is an efficient option without compromising the measurement performance of the SPD-10. Keywords: Scale reduction, Generalizability theory, Classical test theory, Item response theory, Optimal test assembly
ISSN:1471-2288
1471-2288
DOI:10.1186/s12874-022-01766-8