Evidence map›Paper›PMID 27699556›Full record

ArticleQuality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation2017

Testing whether patients with diabetes and healthy people perceive the meaning of the items in the Persian version of the SF-36 questionnaire similarly: a differential item functioning analysis.

Zahra Bagheri, Peyman Jafari, Marzieh Mahmoodi, Mohammad Hossein Dabbaghmanesh

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Article in Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers, 2 of them syntheses that pooled it.

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5citing papers in PubMed, 2 pooled it
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1 · What the graph read from it

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3 · Its place in the literature

Who cites it

5 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Diabetic foot disease: a systematic literature review of patient-reported outcome measures.Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation · 2021
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5 · Who and what money

Authors and funding

4 authors.

Zahra BagheriDepartment of Biostatistics, Shiraz University of Medical Sciences, Shiraz, Iran.
Peyman JafariDepartment of Biostatistics, Shiraz University of Medical Sciences, Shiraz, Iran. jafarip@sums.ac.ir.
Marzieh MahmoodiDepartment of Biostatistics, Shiraz University of Medical Sciences, Shiraz, Iran.
Mohammad Hossein DabbaghmaneshEndocrine and Metabolism Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeIt has been rarely studied whether observed disparity in health-related quality-of-life (HRQoL) scores between patients with diabetes and healthy individuals is due to differential item functioning (DIF) or a true difference in the underlying construct. This study aimed to examine DIF in the SF-36 questionnaire and its effect on comparing HRQoL scores between patients with diabetes and healthy people.

methodsThe sample consisted of 230 patients with type 2 diabetes and 642 healthy individuals who filled out the Persian version of the SF-36 questionnaire. To detect DIF across patients with diabetes and healthy individuals, multiple-group multiple-indicator multiple-causes model was used. In addition, item calibration strategy was used to determine whether the effect of item-level DIF was transferred to the scale level.

resultsNine out of thirty-six (25 %) items were detected as DIF, of which one item (11 %) was flagged as uniform and eight items (89 %) as non-uniform DIF. Most of the DIF items were detected in the mental health component which includes vitality, perceived mental health and social functioning subscales rather than in physical health component. Moreover, nonsignificant latent mean differences for general health perception and social functioning subscales became significant after DIF calibration.

conclusionThe findings of the present study show that patients with diabetes and healthy individuals perceived some items in the SF-36 questionnaire differently. More importantly, in some subscales, the effect of item-level DIF was transferred to the scale level. Consequently, considerable caution should be taken in comparing HRQoL scores between patients with diabetes and healthy individuals.

Indexed as

Quality of LifeAdultCase-Control StudiesDiabetes Mellitus, Type 2Factor Analysis, StatisticalFemaleHumansIranMaleMiddle AgedPerceptionSurveys and QuestionnairesTranslationsDifferential item functioningHealthy populationPatients with diabetesQuality of lifeSF-36

Identifiers

PMID27699556

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.