Evidence map›Paper›PMID 28586373›Full record

ArticlePloS one2017

Age and preoperative pain are major confounders for sex differences in postoperative pain outcome: A prospective database analysis.

Hua Zheng, Alexander Schnabel, Maryam Yahiaoui-Doktor, Winfried Meissner, Hugo Van Aken, Peter Zahn, Esther Pogatzki-Zahn

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
40citing papers in PubMed, 1 pooled it
6.0field-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

40 citing papers in PubMed, 1 synthesis or guideline pooled it, 76 citations in OpenAlex.

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  18. Pain After Outpatient Surgical Procedures.Deutsches Arzteblatt international · 2024
    Observational
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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 4 institutions in 2 countries.

Hua ZhengDepartment of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
Alexander SchnabelDepartment of Anesthesiology, Intensive Care and Pain Medicine, University Hospital Muenster, Muenster, Germany.
Maryam Yahiaoui-DoktorInstitute for Medical Informatics, Statistics and Epidemiology, University of Leipzig, Leipzig, Germany.
Winfried MeissnerDepartment of Anesthesiology and Intensive Care, Jena University Hospital, Jena, Germany.
Hugo Van AkenDepartment of Anesthesiology, Intensive Care and Pain Medicine, University Hospital Muenster, Muenster, Germany.
Peter ZahnDepartment of Anesthesiology and Intensive Care Medicine; Palliative Care Medicine and Pain Management, Berufsgenossenschaftliches Universitätsklinikum Bergmannsheil GmbH Bochum, Ruhr University Bochum, Bochum, Germany.
Esther Pogatzki-ZahnDepartment of Anesthesiology, Intensive Care and Pain Medicine, University Hospital Muenster, Muenster, Germany.ORCID http://orcid.org/0000-0003-0981-3940
University Hospital Münster · DEBG University Hospital Bergmannsheil Bochum · DEJena University Hospital · DELeipzig University · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesCurrent literature is in disagreement regarding female sex as a risk factor for pain after surgery. We hypothesized, that sex differences exist but that they are influenced by certain factors. Here, we investigated the influence of sex for different clinically relevant postoperative pain (POP) outcome parameters and evaluated the role of assumed confounders for sex differences.

methodsFrom 1372 screened patients undergoing orthopedic surgery at the university hospital of Muenster between March 2010 and June 2011, 890 patients were included. The validated International Pain Outcomes questionnaire was used to assess the role of sex for several aspects of POP including pain severity, physical and emotional functional interference as well as the patient's perceptions of the care they received on the first day after surgery. Assessed confounders were age, preoperative chronic pain, anesthetic technique employed and surgical procedure. All statistical analyses were performed with SPSS Statistics Software 22.

resultsLinear regression analysis demonstrated that sex was a statistically significant risk factor for "worst pain since surgery". Additionally, significant sex differences in "time spent in severe pain", "feeling anxious due to pain", "feeling helpless due to pain" and "opioid consumption since surgery" could be identified. An univariate general linear model showed that "age" and "preoperative pain" were significant confounders for sex differences. Further descriptive subgroup analysis revealed consistent sex differences for several POP outcome variables especially in patients older than 50 years or patients with preoperative chronic pain. However, sex differences disappeared in younger patients and in patients without preoperative pain. DISCUSSION: Our data confirmed that sex differences exist in pain intensity and frequency, pain interference with feelings and opioid consumption during the first 24 hours postoperatively. However, sex differences were significantly influenced by the factors "age" and "preoperative pain". These findings may in part explain why clinical studies get different results related to sex differences and renders specific awareness in older women and female patients with preoperative chronic pain.

Indexed as

Pain ManagementAdultAgedAge FactorsAnalgesiaAnalgesics, OpioidAnestheticsFemaleHumansMaleMiddle AgedOrthopedicsPostoperative PainPreoperative PeriodSex CharacteristicsTreatment OutcomeAnalgesics, OpioidAnesthetics

Identifiers

PMID28586373
PMCPMC5460859
OpenAlexW2623789210

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LicenceCC BY
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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.