Evidence map›Paper›PMID 35676675›Full record

SynthesisBMC musculoskeletal disorders2022

Risk factors for postoperative pneumonia in patients undergoing hip fracture surgery: a systematic review and meta-analysis.

Seung-Beom Han, Sang-Bum Kim, Kyun-Ho Shin

Open access · goldAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in BMC musculoskeletal disorders, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed, 1 pooled it
5.4field-weighted citation impact, top 3% 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

23 citing papers in PubMed, 1 synthesis or guideline pooled it, 27 citations in OpenAlex.

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  7. High mortality rates after distal femur fractures in patients with end-stage renal disease.OTA international : the open access journal of orthopaedic trauma · 2025
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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

3 authors at 2 institutions in 1 country.

Seung-Beom HanDepartment of Orthopedic Surgery, Anam Hospital, Korea University College of Medicine, Seoul, South Korea.
Sang-Bum KimJoint Center, Inbone Hospital, Paju-si, Gyeonggi-do, South Korea.
Kyun-Ho ShinDepartment of Orthopedic Surgery, Nanoori Hospital (Incheon), 156, Jangje-ro, Bupyeong-gu, Incheon, 21353, Republic of Korea. kyunho.shin@gmail.com.ORCID https://orcid.org/0000-0001-7110-4278
Korea University Medical Center · KRNa Eun Hospital · KR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundPostoperative pneumonia (POP) is a devastating complication that can frequently occur after hip fracture surgery. This study aimed to quantitatively and comprehensively summarize the risk factors for POP following hip fracture surgery.

methodsPubMed, Embase, and Cochrane Library were systematically searched for studies assessing risk factors for POP following hip fracture surgery. The pooled odds ratio (OR) and standardized mean difference (SMD) between patients with and without POP were calculated. Evidence was assessed using the Newcastle-Ottawa scale.

resultsTen studies including 37,130 patients with hip fractures were selected. POP occurred in 1768 cases with an accumulated incidence of 7.8% (95% confidence interval [CI]: 0.061-0.094). Advanced age (SMD: 0.50, 95% CI: 0.10-0.90), male sex (OR: 1.50, 95% CI: 1.12-2.01), American Society of Anesthesiologists physical status scale ≥3 (OR: 3.17, 95% CI: 1.25-8.05), chronic obstructive pulmonary disease (OR: 2.05, 95% CI: 1.43-2.94), coronary heart disease (OR: 1.82, 95% CI: 1.27-2.60), arrhythmia (OR: 1.49, 95% CI: 1.04-2.15), congestive heart failure (OR: 1.41, 95% CI: 1.14-1.75), chronic kidney disease (OR: 2.09, 95% CI: 1.28-3.41), and cerebrovascular accident (OR: 2.14, 95% CI: 1.60-2.85) were risk factors for POP. Hemoglobin (SMD: -0.14, 95% CI: - 0.25 to - 0.03), albumin (SMD: -0.97, 95% CI: - 1.54--0.41), blood urea nitrogen (SMD: 0.20, 95% CI: 0.03-0.37), alanine aminotransferase (SMD: 0.27, 95% CI: 0.10-0.44), arterial oxygen pressure (SMD: -0.49, 95% CI: - 0.71--0.27), time from injury to surgery (SMD: 0.13, 95% CI: 0.08-0.17), and surgery within 48 h (OR: 3.74, 95% CI: 2.40-5.85) were associated with the development of POP.

conclusionPatients with the aforementioned risk factors should be identified preoperatively, and related prophylaxis strategies should be implemented to prevent POP following hip fracture surgery.

Indexed as

Hip FracturesPneumoniaHumansIncidenceMalePostoperative ComplicationsRisk FactorsHip fractureHip surgeryMeta-analysisPneumoniaPostoperative complicationsPredictorsSystematic reviews

Identifiers

PMID35676675
PMCPMC9174025
OpenAlexW4281912489

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

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.