ArticleTurkish journal of physical medicine and rehabilitation2018
Analyzing differential item functioning of the Nottingham Health Profile by Mixed Rasch Model.
Article in Turkish journal of physical medicine and rehabilitation, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Impacts of DIF Item Balance and Effect Size Incorporation With the Rasch Tree.Educational and psychological measurement · 2026Article
- DIF: Concepts, Measurement, and Impact in Patient-Focused Drug Development and Regulatory Decision-Making.Drug design, development and therapy · 2026Review
- Myofascial release therapy in patients with cervical myofascial pain syndrome: A randomized-controlled trial.Turkish journal of physical medicine and rehabilitation · 2025Article
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Authors and funding
5 authors.
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Abstract
objectivesThis study aims to evaluate whether items in the Turkish version of the Nottingham Health Profile (NHP) function differently according to age, sex, and duration of pain using the Mixed Rasch Model (MRM). PATIENTS AND
methodsThe NHP data of patients with low back pain from a previous study was analyzed. To analyze differential item functioning (DIF) within the items of the NHP, the MRM was used. Age, sex, and duration of pain were considered factors which could cause DIF. The most powerful factor to define latent classes derived from the MRM was estimated using the Rasch tree method.
resultsThe two-class mixture version of the nominal response model was identified as the best fitting model for the physical mobility, sleep, and social isolation sections. For the physical mobility dimension, some items showed DIF by age and for the social isolation dimension some items showed DIF by sex. For the sleep dimension, latent classes were unable to be explained by age, sex, and duration of pain. Items in other dimensions of the NHP were DIF-free and no items showed DIF according to age, sex, and duration of pain.
conclusionThe results of this study may shed light on explaining the different response behavior of patients on the items of the NHP. Age and sex were found to be variables affecting item responses of NHP. Contrary to expectations, duration of pain did not cause DIF for any item. From the perspective of DIF, it can be concluded that NHP scale is a robust scale in terms of validity.
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