Evidence map›Paper›PMID 31266505›Full record

ArticleHealth and quality of life outcomes2019

Differential item functioning of the SF-12 in a population-based regional joint replacement registry.

Iraj Yadegari, Eric Bohm, Olawale F Ayilara, Lixia Zhang, Richard Sawatzky, Tolulope T Sajobi, Lisa M Lix

Open access · goldAbstract read
In one paragraph

Article in Health and quality of life outcomes, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
1.3field-weighted citation impact, top 20% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

11 citing papers in PubMed, 15 citations in OpenAlex.

  1. Article
  2. Psychometric properties of the Chinese version of PROMIS-29 in patients receiving kidney replacement therapy.Zhong nan da xue xue bao. Yi xue ban = Journal of Central South University. Medical sciences · 2026
    Article
  3. Tree-based item-response theory model for evaluating differential item functioning in patient-reported outcome measures: a web-based R Shiny implementation.Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation · 2025
    Article
  4. Article
  5. Screening for depression in patients with epilepsy: same questions but different meaning to different patients.Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation · 2024
    Article
  6. Article
  7. Global mapping of institutional and hospital-based (Level II-IV) arthroplasty registries: a scoping review.European journal of orthopaedic surgery & traumatology : orthopedie traumatologie · 2024
    Article
  8. Article
  9. Article
  10. Article
  11. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 4 institutions in 1 country.

Iraj YadegariDepartment of Mathematics and Statistics, University of Ottawa, Ottawa, ON, Canada.
Eric BohmDepartment of Surgery, University of Manitoba, Winnipeg, MB, Canada.
Olawale F AyilaraDepartment of Mathematics and Statistics, University of Ottawa, Ottawa, ON, Canada.
Lixia ZhangDepartment of Mathematics and Statistics, University of Ottawa, Ottawa, ON, Canada.
Richard SawatzkySchool of Nursing, Trinity Western University, Langley, BC, Canada.
Tolulope T SajobiDepartment of Community Health Sciences, University of Calgary, Calgary, AB, Canada.
Lisa M LixDepartment of Mathematics and Statistics, University of Ottawa, Ottawa, ON, Canada. lisa.lix@umanitoba.ca.ORCID http://orcid.org/0000-0001-8685-3212
University of Ottawa · CAUniversity of Calgary · CAUniversity of Manitoba · CAWestern University · CA

Funding

Canadian Institutes of Health Research MOP-142404
6 · The paper itself

Abstract

backgroundJoint replacement, an increasingly common procedure amongst older adults, can substantially improve health-related quality of life (HRQoL). However, differential item functioning (DIF) may affect the accurate interpretation of differences in HRQoL amongst patients with different demographic and health status characteristics but the same underlying (i.e., latent) level of the investigated construct. This study tested for DIF in pre-operative SF-12 physical health (PH) and mental health (MH) sub-scale items amongst patients undergoing total hip arthroplasty (THA) and total knee arthroplasty (TKA).

methodsData were from a population-based joint replacement registry from the Canadian province of Manitoba. TKA and THA patients who had surgery between 2009 and 2015 and completed a pre-operative assessment were included. DIF was tested using the multiple indicators multiple causes (MIMIC) method with sex, age group, body weight status, and presence of multiple comorbid conditions (i.e., multimorbidity) as covariates. Analyses were stratified by joint type.

resultsThe study cohort included 8820 patients; 42.1% underwent THA, 57.3% were female, 32.7% were 70+ years, and 52.8% were obese. For each sub-scale, four of the six items exhibited DIF in both THA and TKA groups. Differences in the covariate effect estimates for DIF and No-DIF models on the MH latent variable were largest for age and body weight status for the THA group, and for sex and multimorbidity for the TKA group. All of the differences were small for PH. Multimorbidity had the strongest association with PH and age and sex had the strongest association with MH in the DIF models.

conclusionsDemographic and health status characteristics influenced SF-12 PH and MH item responses in joint replacement populations, although the size of the effects were not large for PH. We recommend testing and adjusting for DIF effects to ensure comparability of HRQoL measures in joint replacement populations.

Indexed as

MultimorbidityQuality of LifeAgedArthroplasty, Replacement, HipArthroplasty, Replacement, KneeCanadaCohort StudiesFemaleHealth StatusHumansMaleManitobaMiddle AgedRegistriesRetrospective StudiesSurveys and QuestionnairesArthroplastyClinical registryHealth-related quality of lifeMeasurement bias

Identifiers

PMID31266505
PMCPMC6604189
OpenAlexW2954058792

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.