ArticleArthroplasty today2018
Confounding pain and function: the WOMAC's failure to accurately predict lower extremity function.
Article in Arthroplasty today, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 1 of them a synthesis that pooled 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.
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.
Who cites it
13 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Classification of Physical Activity Programs Based on the Kellgren & Lawrence Scale for Knee Osteoarthritis: A Systematic Review.Musculoskeletal care · 2024Pooled it
- Psychometric properties of the knee osteoarthritis pain index.Pain medicine (Malden, Mass.) · 2025Trial
- Commentary on "Effect of baseline values on inpatient rehabilitation outcomes after total knee arthroplasty: a retrospective observational study".Journal of rehabilitation medicine · 2025Article
- Effect of baseline values on inpatient rehabilitation outcomes after total knee arthroplasty: a retrospective observational study.Journal of rehabilitation medicine · 2025Observational
- Fu's subcutaneous needling approach versus electroacupuncture for knee osteoarthritis: protocol for comparative effectiveness and safety randomized controlled trial.Frontiers in medicine · 2025Article
- Characterization of clinical data for patient stratification in moderate osteoarthritis with support vector machines, regulatory network models, and verification against osteoarthritis Initiative data.Scientific reports · 2024Article
- Outcomes Vary by Pre-Operative Physical Activity Levels in Total Knee Arthroplasty Patients.Journal of clinical medicine · 2023Article
- Multicenter, prospective cohort study: immediate postoperative gains in active range of motion following robotic-assisted total knee replacement compared to a propensity-matched control using manual instrumentation.Arthroplasty (London, England) · 2023Article
- Stepping Beyond Counts in Recovery of Total Hip Arthroplasty: A Prospective Study on Passively Collected Gait Metrics.Sensors (Basel, Switzerland) · 2023Article
- Spatiotemporal parameters from remote smartphone-based gait analysis are associated with lower extremity functional scale categories.Frontiers in rehabilitation sciences · 2023Article
- Radiofrequency ablation prior to total knee arthroplasty does not improve post-surgical pain or recovery: a double-blinded, multi-center, randomized clinical trial.Annals of joint · 2023Article
- Does obesity affect patient-reported outcomes following total knee arthroplasty?BMC musculoskeletal disorders · 2022Article
- Cross-Cultural Adaptation and Validation of the Simplified Chinese Version of the Lower Extremity Functional Scale.BioMed research international · 2020Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
3 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundInvestigations have revealed the Western Ontario and McMaster Universities Osteoarthritis Index's (WOMAC) inability to provide distinct assessments of pain and function. The Lower Extremity Functional Scale (LEFS) has not displayed this deficiency. Our purposes were to investigate further the WOMAC physical function's (WOMAC-PF) ability to accurately assess lower extremity mobility in patients undergoing total knee arthroplasty (TKA) and to establish a relationship between pre- and post-TKA WOMAC-PF and LEFS scores that accounts for the apparent bias WOMAC pain scores impose on WOMAC-PF scores.
methodsWOMAC, LEFS, and Timed-up-and-go measures were administered before TKA and 4 days, 6 weeks, and 3 months after TKA. To evaluate the WOMAC-PF and LEFS ability to provide a distinct assessment of pain and function, a paired t-test compared pre-TKA and 4 days after TKA values. Generalized estimating equation (GEE) analysis assessed the relationship between pre- and post-TKA values: dependent variable WOMAC-PF scores; independent variables LEFS scores, and measurement occasions.
resultsTimed-up-and-go and LEFS demonstrated a reduction in lower extremity function (
conclusionsOur findings support previous investigations that showed the WOMAC-PF's inability to provide a valid assessment in change in function. The GEE analysis coefficients can be used to convert LEFS scores to WOMAC-PF scores that adjust for the bias between pre- and post-TKA assessments.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
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.