Evidence map›Paper›PMID 31470831›Full record

ArticleBMC musculoskeletal disorders2019

Risk factor analysis for delayed union after subtrochanteric femur fracture: quality of reduction and valgization are the key to success.

Viola Freigang, Franziska Gschrei, Himanshu Bhayana, Paul Schmitz, Johannes Weber, Maximilian Kerschbaum, Michael Nerlich, Florian Baumann

Abstract read
In one paragraph

Article 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 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing 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

15 citing papers in PubMed.

  1. Article
  2. Non-union after bisphosphonate-associated atypical femoral fractures: a review of the current literature.European journal of orthopaedic surgery & traumatology : orthopedie traumatologie · 2026
    Review
  3. Article
  4. Article
  5. Fracture-Related Infection of the Proximal Femur - Diagnostics and Treatment.Geriatric orthopaedic surgery & rehabilitation · 2025
    Review
  6. Article
  7. Impact of lateral cortical notching on biomechanical performance in cephalomedullary nailing for unstable pertrochanteric fractures.European journal of trauma and emergency surgery : official publication of the European Trauma Society · 2024
    Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Nailing femoral shaft fracture with postless distraction technique: a new technique enabled by shape-conforming pad.Journal of orthopaedics and traumatology : official journal of the Italian Society of Orthopaedics and Traumatology · 2021
    Article
  15. Review
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

8 authors.

Viola FreigangDepartment of Trauma Surgery, Regensburg University Medical Center, 93042, Regensburg, Germany.
Franziska GschreiDepartment of Trauma Surgery, Regensburg University Medical Center, 93042, Regensburg, Germany.
Himanshu BhayanaDepartment of Orthopaedics, UCMS and GTB Hospital, Delhi, 110095, India.
Paul SchmitzDepartment of Trauma Surgery, Regensburg University Medical Center, 93042, Regensburg, Germany.
Johannes WeberDepartment of Trauma Surgery, Regensburg University Medical Center, 93042, Regensburg, Germany.
Maximilian KerschbaumDepartment of Trauma Surgery, Regensburg University Medical Center, 93042, Regensburg, Germany.
Michael NerlichDepartment of Trauma Surgery, Regensburg University Medical Center, 93042, Regensburg, Germany.
Florian BaumannDepartment of Trauma Surgery, Regensburg University Medical Center, 93042, Regensburg, Germany. florian.baumann@ukr.de.ORCID https://orcid.org/0000-0003-1413-3587

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundSubtrochanteric femur fractures (SFF) are uncommon, but have a high complication rate concerning non-union and mechanical complications. There is ongoing discussion about risk factors for delayed fracture healing after SFF. The purpose of this study was to evaluate potential risk factors for delayed fracture healing after SFF.

methodsThis retrospective radio-morphometric case control study compares 61 patients after SFF in two groups (uncomplicated healing within 6 months postoperatively vs. delayed union) concerning radiographical properties. The patients were analyzed concerning the following parameter: Quality of the reduction according to Baumgaertner, CCD-angle, Tip-Apex Distance, leg-length shortening and fracture healing according to the RUSH Score.

resultsThe mean RUSH-Score at 6 months postoperatively was 21.32(±4.57). At that point of time, only 29/61 fractures were radiographically fully consolidated (timely fracture healing) and 32 patients were rated as delayed union. The total revision rate was 9/61 (14.7%), whereof four patients required revision for symptomatic non-union of the SFF. The results of the radio-morphometric measurement showed a significant difference between both groups concerning the degree of reduction measured according to Baumgaertner (p = 0.022). The postoperative ipsilateral CCD-angle was different between the two groups (p = 0.019). After 12 months postoperatively, 48/61 (78.6%) of fractures were rated healed without any further intervention.

conclusionsDelayed union after SFF occurs frequently. In our patient population, the quality of reduction and the postoperative CCD-angle were the key factors to avoid delayed union. LEVEL OF EVIDENCE: Level III, Therapeutic study.

trial registrationClinical Trial Registry University of Regensburg Z-2018-1074-1. Registered 04. Aug 2018. https://studienanmeldung.zks-regensburg.de.

Indexed as

Fracture HealingAdultAgedBone NailsCase-Control StudiesFemaleFemoral FracturesFemurFollow-Up StudiesFracture Fixation, IntramedullaryFractures, UnunitedHumansMaleMiddle AgedRadiographyReoperationDelayed unionFracture healingNon-unionPseudarthrosisRisk factor analysisSubtrochanteric femur fracture (SFF)

Identifiers

PMID31470831
PMCPMC6717321

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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.