Evidence map›Paper›PMID 30729990›Full record

ArticleArchives of orthopaedic and trauma surgery2019

Risk factors for nonunion after intramedullary nailing of subtrochanteric femoral fractures.

Dietmar Krappinger, Bernhard Wolf, Dietmar Dammerer, Martin Thaler, Peter Schwendinger, Richard A Lindtner

Open access · hybridAbstract read
In one paragraph

Article in Archives of orthopaedic and trauma surgery, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 41 papers.

0numbers the graph read from it
0cells of the map it votes in
41citing papers in PubMed
7.5field-weighted citation impact, top 2% 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

41 citing papers in PubMed, 68 citations in OpenAlex.

  1. What is the rate and degree of deformity in femoral diaphyseal nonunion? A CT-based retrospective cohort study.European journal of trauma and emergency surgery : official publication of the European Trauma Society · 2026
    Article
  2. Plate-tensioned reconstruction nail for proximal femur diaphyseal nonunion.OTA international : the open access journal of orthopaedic trauma · 2026
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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 at 2 institutions in 1 country.

Dietmar KrappingerDepartment of Trauma Surgery, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria.
Bernhard WolfDepartment of Trauma Surgery, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria.
Dietmar DammererDepartment of Orthopaedics, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria.
Martin ThalerDepartment of Orthopaedics, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria.
Peter SchwendingerDepartment of Trauma Surgery, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria.
Richard A LindtnerDepartment of Trauma Surgery, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria. richard.lindtner@i-med.ac.at.
Universität Innsbruck · ATInnsbruck Medical University · AT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionNonunion is a common complication after intramedullary nailing of subtrochanteric femoral fractures. A more detailed knowledge, particularly of avoidable risk factors for subtrochanteric fracture nonunion, is thus desired to develop strategies for reducing nonunion rates. The aim of the present study therefore was to analyse a wide range of parameters as potential risk factors for nonunion after intramedullary nailing of subtrochanteric fractures. MATERIALS AND

methodsSeventy-four patients who sustained a subtrochanteric fracture and were treated by femoral intramedullary nailing at a single level 1 trauma centre within a 6-year period were included in this study. A total of 15 patient-related, fracture-related, surgery-related, mechanical and biological parameters were analysed as potential risk factors for nonunion. Furthermore, the accuracy of each of these parameters to predict nonunion was calculated.

resultsNonunion occurred in 17 of 74 patients (23.0%). Of the 15 potential risk factors analysed, only 3 were found to have a significant effect on the nonunion rate (p < 0.05): postoperative varus malalignment, postoperative lack of medial cortical support and autodynamisation of the nail within the first 12 weeks post-surgery. Accuracy of each of these 3 parameters to predict nonunion was > 0.70. Furthermore, the nonunion rate significantly increased with the number of risk factors (no risk factor: 2.9%, one risk factor: 23.8%, two risk factors: 52.9%, and three risk factors: 100% [Chi-square test, p = 0.001)].

conclusionsOur study indicates that intraoperative correction of varus malalignment and restoration of the medial cortical support are the most critical factors to prevent nonunion after intramedullary nailing of subtrochanteric femoral fractures. In addition, autodynamisation of the nail within the first 3 months post-surgery is a strong predictor for failure and should result in revision surgery.

Indexed as

Fracture Fixation, IntramedullaryHip FracturesCohort StudiesHumansPostoperative ComplicationsRisk FactorsTreatment FailureFemoral fractureFemoral nailingIntramedullary nailingNonunionPseudarthrosisRisk factorsSubtrochanteric femoral fractureSubtrochanteric fracture

Identifiers

PMID30729990
PMCPMC6514068
OpenAlexW2912681443

What OpenQuestion holds

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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.