Validation of the Malaysian Versions of Parents and Children Health Survey for Asthma by Using Rasch-Model

Hussein, Maryam Se; Akram, Waqas; Mamat, Mohd Nor; Majeed, Abu Bakar Abdul; Ismail, Nahlah Elkudssiah

doi:10.7860/jcdr/2015/11995.5801

Cited by 2 publications

(1 citation statement)

References 11 publications

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“… 14 That being said, RMT has unique advantages over IRT: item parameter estimates generated by RMT analyses are independent from the distributional properties of the sample from which they are derived. 15 – 19 While results arising from the analysis of PRO data from a sample must be sample-dependent to some extent, RMT analyses allow for the meaningful comparisons of item performance and scale performance stability to be performed across groups with different distributions. This critical concept is fundamentally important.…”

Section: Introductionmentioning

confidence: 99%

Testing patient-reported outcome measurement equivalence in multinational clinical trials: An exemplar using the 12-item Multiple Sclerosis Walking Scale

Dib

Tamam

Terzı

et al. 2017

Multiple Sclerosis Journal - Experimental, Translational and Cl

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BackgroundAlthough multinational clinical trials frequently use patient-reported outcomes to measure efficacy, measurement equivalence across cultures and languages, a scientific requirement, is rarely tested. Clinically accessible accounts are rare; exemplars are needed.ObjectiveTo develop and test a Turkish version of the Multiple Sclerosis Walking Scale (MSWS-12v2) as a clinical exemplar for examining measurement equivalence.MethodsThe MSWS-12v2 Turkish (MSWS-12v2T) was developed using recognised methods for linguistic equivalence. Rasch measurement theory was used to examine measurement performance (multiple tests of targeting, scale performance, and person measurement) and measurement equivalence (differential item functioning). UK data (n = 3310) were used for comparisons and differential item functioning testing.ResultsOne hundred and twenty-four people from two Turkish centres completed the MSWS-12v2T. Rasch measurement theory evidence supported MSWS-12v2T as reliable (person separation = 0.96) and valid (thresholds ordered; no concerning item misfit, bias, or person misfit). However, four items demonstrated significantly different performance between UK and Turkish samples. These item differences significantly affected scores (person measurements) at the group-level (p < 0.001). Individual person differences were less pronounced.ConclusionsLinguistic equivalence does not guarantee measurement equivalence; independent testing is required. Rasch measurement theory enables sophisticated and unique examinations of cross-cultural measurement equivalence and we recommend this be tested routinely in pivotal multiple sclerosis clinical trials.

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