Evidence map›Paper›PMID 31656185›Full record

Observational studyBMC musculoskeletal disorders2019

Characteristics of young and lower functioning patients following total knee arthroplasty: a retrospective study.

Jesse C Christensen, Andrew J Kittelson, Brian J Loyd, Michael A Himawan, Charles A Thigpen, Jennifer E Stevens-Lapsley

Abstract readObservational Study
PubMed Full text at PMC Publisher
In one paragraph

Observational study in BMC musculoskeletal disorders, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
–field-weighted citation impact
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

4 citing papers in PubMed.

  1. Trial
  2. Article
  3. [Effectiveness and safety analysis of simultaneous bilateral total knee arthroplasty in treatment of patients aged 65 years and younger with bilateral knee osteoarthritis].Zhongguo xiu fu chong jian wai ke za zhi = Zhongguo xiufu chongjian waike zazhi = Chinese journal of reparative and reconstructive surgery · 2025
    Article
  4. 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

6 authors.

Jesse C ChristensenDepartment of Physical Medicine and Rehabilitation, Eastern Colorado Geriatric Research Education and Clinical Center, 13001 E. 17th Pl, Aurora, CO, 80045, USA. jesse.christensen@cuanschutz.edu.
Andrew J KittelsonDepartment of Physical Medicine and Rehabilitation, University of Colorado, Aurora, CO, USA.
Brian J LoydDepartment of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, UT, USA.
Michael A HimawanDepartment of Physical Medicine and Rehabilitation, University of Colorado, Aurora, CO, USA.
Charles A ThigpenATI Physical Therapy, Greenville, SC, USA.
Jennifer E Stevens-LapsleyDepartment of Physical Medicine and Rehabilitation, Eastern Colorado Geriatric Research Education and Clinical Center, 13001 E. 17th Pl, Aurora, CO, 80045, USA.

Funding

Rheumatological Research Foundation Graduate Student Preceptorship
6 · The paper itself

Abstract

backgroundRates of total knee arthroplasty (TKA) procedures in younger, more medically complex patients have dramatically increased over the last several decades. No study has examined categorization of lower and higher functioning subgroups within the TKA patient population. Our study aimed to determine preoperative characteristics of younger patients who are lower functioning following TKA.

methodsPatients were categorized into higher and lower functioning subgroups defined using a median split of 1) postoperative Timed Up and Go (TUG) test times and 2) Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) physical function subscale scores. A split in age (65 years) was used to further classify patients into four categories: younger lower functioning, younger higher functioning, older lower functioning and older higher functioning. Measures from preoperative domains of health, psychological, physical performance and pain severity were examined for between-group differences.

resultsComparing mean values, the younger lower functioning subgroup using the TUG had significantly weaker knee extensor, slower gait speed, higher body mass index and greater pain compared to other subgroups. The younger lower functioning subgroup using the WOMAC physical function subscale demonstrated higher pain levels and Coping Strategies Questionnaire-Catastrophizing Subscale scores compared to the older lower functioning subgroup.

conclusionsPoorer preoperative physical performance and pain severity appear to have the largest influence on early postoperative TKA recovery in younger lower functioning patients relative to both younger and older higher functioning patients.

Indexed as

Recovery of FunctionAgedAge FactorsArthroplasty, Replacement, KneeFemaleHumansKnee JointMaleMiddle AgedOsteoarthritis, KneePain MeasurementPostoperative PainRetrospective StudiesSeverity of Illness IndexTreatment OutcomeClinical outcomesPhysical performanceSelf-reportSubgroupingTotal knee arthroplasty

Identifiers

PMID31656185
PMCPMC6815380

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Registered trials

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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.