Evidence map›Paper›PMID 41912053›Full record

ArticleBrazilian journal of anesthesiology (Elsevier)

Preoperative anemia as a marker of postoperative outcomes: a retrospective cohort study.

Liege Caroline Immich, Liliane Ghi Mei Law, Igor Heineck Ouriques, Yan Prates Pimentel, Christian Camatti Menegon, Florentino Fernandes Mendes

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In one paragraph

Article in Brazilian journal of anesthesiology (Elsevier). The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing 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

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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

1 citing paper in PubMed.

  1. Article
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.

Liege Caroline ImmichUniversidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil; Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Graduate Program in Information Technology and Health Management (PGTIGSaúde), Porto Alegre, RS, Brazil.
Liliane Ghi Mei LawUniversidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil.
Igor Heineck OuriquesUniversidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil.
Yan Prates PimentelUniversidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil.
Christian Camatti MenegonUniversidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil.
Florentino Fernandes MendesUniversidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil; Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Post-Graduation Program in Information Technology and Health Management, Department of Surgical Clinics, Porto Alegre, RS, Brazil. Electronic address: florentinomendes@gmail.com.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundPreoperative anemia is common and associated with adverse postoperative outcomes.

objectiveTo evaluate the association between preoperative anemia severity and clinical outcomes in patients undergoing elective noncardiac surgery.

methodsThis retrospective cohort included 23,579 adults assessed preoperatively between January 2015 and August 2025, all with documented hemoglobin (Hb) and hospitalized for noncardiac surgery. Patients were stratified as no anemia (≥ 13 g.dL

resultsAmong the participants, 15,909 (67.5%) had no anemia, 6,396 (27.1%) mild, 1,174 (5.0%) moderate, and 100 (0.4%) severe anemia. Overall, 62.6% were female, and the mean age was 60.7 years (SD ±15.4). Compared with no anemia, all anemia categories were independently associated with higher in-hospital mortality, increased ICU admission, and longer LOS. Severe anemia was the strongest predictor of in-hospital mortality (adjusted RR = 24.7; 95% CI 13.3‒46.0; p < 0.001). Intermediate or major surgeries (RR = 4.7; 95% CI 3.4‒6.6), age > 54 years (RR = 4.4; 95% CI 2.6‒7.6), and male sex (RR = 2.1; 95% CI 1.6‒2.9) were also independent predictors of in-hospital mortality.

conclusionsPreoperative anemia, even when mild, was independently associated with higher in-hospital mortality, greater ICU admission, and prolonged hospitalization. These results support systematic screening and targeted management, including Patient Blood Management (PBM) strategies, to improve perioperative outcomes.

Indexed as

AnemiaElective Surgical ProceduresPostoperative ComplicationsAdultAgedCohort StudiesFemaleHospital MortalityHumansIntensive Care UnitsLength of StayMaleMiddle AgedPreoperative PeriodRetrospective StudiesSeverity of Illness IndexAnemiaAnesthesiologyElective surgical proceduresPostoperative complicationsPreoperative care

Identifiers

PMID41912053
PMCPMC13092595

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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.