Evidence map›Paper›PMID 18670832›Full record

ArticleClinical orthopaedics and related research2008

Higher early mortality with simultaneous rather than staged bilateral TKAs: results from the Swedish Knee Arthroplasty Register.

Anna Stefánsdóttir, Lars Lidgren, Otto Robertsson

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

Article in Clinical orthopaedics and related research, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 38 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
38citing papers in PubMed, 2 pooled it
–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

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

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  17. One-stage versus 2-stage bilateral total joint arthroplasty: a matched cohort study.Canadian journal of surgery. Journal canadien de chirurgie · 2020
    Article
  18. Simultaneous, same-anaesthetic bilateral total knee arthroplasty has low mortality and complication rates.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2018
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

3 authors.

Anna StefánsdóttirDepartment of Orthopaedics and Clinical Sciences, Lund University Hospital, 22185, Lund, Sweden. anna.stefansdottir@med.lu.se
Lars Lidgren
Otto Robertsson

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

unlabelledPatients with knee osteoarthritis (OA) often present with symptoms that warrant bilateral TKAs. There are potential benefits to operating on both knees on the same day, but the safety of simultaneous bilateral TKAs has been questioned. To evaluate whether there were any differences in 30-day mortality between patients having simultaneous bilateral TKAs and those having staged bilateral TKAs, we analyzed data from the Swedish Knee Arthroplasty Register and the Swedish Cause of Death Register. We included 48,931 patients with OA having 60,062 primary TKAs during 1985 to 2004; 1139 had surgery on both knees on the same day (simultaneous bilateral) and 3432 had surgery on both knees on two different occasions with less than 1 year between operations (staged bilateral). The 30-day mortality after simultaneous bilateral TKAs was 7.53 (confidence interval, 2.62-21.69) times higher than after the second of staged TKA and 3.77 (confidence interval, 2.04-6.98) times higher than after a primary unilateral TKA. Assuming the total risk for a staged procedure is twice that of a unilateral procedure, the risk of mortality within 30 days is 1.94 (confidence interval, 1.05-3.59) times higher with simultaneous than staged TKA. It is safer to operate on one knee at a time. LEVEL OF EVIDENCE: Level II, therapeutic study. See the Guidelines for Authors for a complete description of levels of evidence.

Indexed as

AdultAgedAged, 80 and overArthroplasty, Replacement, KneeCause of DeathFemaleHumansMaleMiddle AgedOsteoarthritis, KneeRegistriesSurvival AnalysisSweden

Identifiers

PMID18670832
PMCPMC2628216

What OpenQuestion holds

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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.