Evidence map›Paper›PMID 26105765›Full record

Observational studyInternational orthopaedics2016

Loss of offset after pertrochanteric hip fractures affects hip function one year after surgery with a short intramedullary nail. A prospective cohort study.

Max Gordon, Per-Olov Berntsson, Erik Sjölund, Yilmaz Demir, Carl Johan Hedbeck, André Stark, Olof Sköldenberg

Abstract readObservational Study
PubMed Publisher
In one paragraph

Observational study in International orthopaedics, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed, 1 pooled it
1.2field-weighted citation impact, top 22% 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

14 citing papers in PubMed, 1 synthesis or guideline pooled it, 20 citations in OpenAlex.

  1. Short- and long-term prognostic factors associated with functional recovery in elderly patients with hip fracture: A systematic review.Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2022
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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

7 authors at 3 institutions in 2 countries.

Max GordonDivision of Orthopaedics, Department of Clinical Sciences, Karolinska Institutet at Danderyd Hospital, 182 88, Danderyd, Sweden.
Per-Olov BerntssonDivision of Orthopaedics, Department of Clinical Sciences, Karolinska Institutet at Danderyd Hospital, 182 88, Danderyd, Sweden.
Erik SjölundDivision of Orthopaedics, Department of Clinical Sciences, Karolinska Institutet at Danderyd Hospital, 182 88, Danderyd, Sweden.
Yilmaz DemirDivision of Orthopaedics, Department of Clinical Sciences, Karolinska Institutet at Danderyd Hospital, 182 88, Danderyd, Sweden.
Carl Johan HedbeckDivision of Orthopaedics, Department of Clinical Sciences, Karolinska Institutet at Danderyd Hospital, 182 88, Danderyd, Sweden.
André StarkDivision of Orthopaedics, Department of Clinical Sciences, Karolinska Institutet at Danderyd Hospital, 182 88, Danderyd, Sweden.
Olof SköldenbergDivision of Orthopaedics, Department of Clinical Sciences, Karolinska Institutet at Danderyd Hospital, 182 88, Danderyd, Sweden. olof.skoldenberg@ki.se.
Karolinska Institutet · SEDanderyds sjukhus · SEGlanrhyd Hospital · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeWe hypothesised that protruding collum screws in intramedullary nails used for pertrochanteric fractures cause lateral pain/discomfort and that loss of offset relates to poorer hip function.

methodsSeventy-six patients with an acute pertrochanteric femoral fracture AO types A1 and A2 were operated upon using a short intramedullary nail and were included in a prospective observational cohort study and followed-up for one year. The main outcome variables were lateral pain and hip function as evaluated with the Harris Hip Score. The main exposure was compression along the collum screw and lateral protrusion measured by anteroposterior X-ray images. Perioperative images were compared to images at the follow-up visit. Outcome variables were adjusted in regression models for reduction, fracture type, body mass index, sex and age.

resultsA total of 28 (36 %) patients experienced lateral pain at one year. We found a correlation between lateral protrusion and lateral pain, adjusted OR 4.5 per protruding centimetre (95 % CI, 1.1-17.5). Collum compression correlated with a poorer outcome with Harris Hip Score -14.2 per compressed centimetre (95 % CI, -21.8 to -6.7).

conclusionsIn patients with type A1 and A2 pertrochanteric fractures operated on using intramedullary nailing, a large compression and lateral protrusion of the collum screw are associated with poorer hip function and lateral pain. New technical improvements for implants should focus on these factors to improve functional outcome after surgery.

Indexed as

AgedAged, 80 and overBone NailsBone ScrewsFemaleFracture Fixation, IntramedullaryHip FracturesHumansMaleProspective StudiesProsthesis DesignRecovery of FunctionIntramedullary nailLateral painOffsetPertrochanteric hip fracture

Identifiers

PMID26105765
OpenAlexW831511409

What OpenQuestion holds

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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.