Evidence map›Paper›PMID 42861051›Full record

ArticleSurgery open science2026

Association of weekend admission on immediate postoperative outcomes following non-elective cardiac operations.

Konmal Ali, Syed Shaheer Ali, Troy Coaston, Melissa Justo, Jaden Rahmani, Sidney Hinks, Giselle Porter, Owen Lai, Peyman Benharash

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Surgery open science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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

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

0 citing papers in PubMed.

No citing paper in PubMed yet.

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

9 authors.

Konmal AliCardiovascular Outcomes Research Laboratories (CORELAB), University of California, Los Angeles, CA, United States of America.
Syed Shaheer AliCardiovascular Outcomes Research Laboratories (CORELAB), University of California, Los Angeles, CA, United States of America.
Troy CoastonCardiovascular Outcomes Research Laboratories (CORELAB), University of California, Los Angeles, CA, United States of America.
Melissa JustoCardiovascular Outcomes Research Laboratories (CORELAB), University of California, Los Angeles, CA, United States of America.
Jaden RahmaniCardiovascular Outcomes Research Laboratories (CORELAB), University of California, Los Angeles, CA, United States of America.
Sidney HinksCardiovascular Outcomes Research Laboratories (CORELAB), University of California, Los Angeles, CA, United States of America.
Giselle PorterCardiovascular Outcomes Research Laboratories (CORELAB), University of California, Los Angeles, CA, United States of America.
Owen LaiCardiovascular Outcomes Research Laboratories (CORELAB), University of California, Los Angeles, CA, United States of America.
Peyman BenharashCardiovascular Outcomes Research Laboratories (CORELAB), University of California, Los Angeles, CA, United States of America.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background: The "weekend effect" refers to inferior outcomes among patients admitted during weekends. Although documented across multiple medical specialties, studies evaluating weekend admission for cardiac surgery have yielded conflicting results. We assessed immediate postoperative outcomes following weekend cardiac admissions using a contemporary national database. Methods: Adults (≥18 years) undergoing non-elective major cardiac operations, including coronary artery bypass grafting, valvular, and aortic procedures, were identified from the 2016-2022 National Inpatient Sample. Patients were stratified by weekend versus weekday admission, defined as operative intervention within a day of admission. The primary outcome was in-hospital mortality. Secondary outcomes included length of stay (LOS), hospitalization costs, and non-home discharge. Multivariable regression models adjusted for demographics, comorbidity burden, operative type, hospital volume, and year. Results: Among an estimated 99,865 patients, 14,565 were admitted over the weekend. Compared to others, weekend patients were younger, more commonly female, and were more frequently insured by Medicaid (all Conclusion: Weekend admission for non-elective major cardiac surgery is associated with worse clinical outcomes and increased resource utilization nationwide, highlighting a persistent weekend care disparity which warrants further investigation into underlying drivers.

Indexed as

Cardiac surgeryNational Inpatient SampleOutcomesWeekend admission

Identifiers

PMID42861051
PMCPMC13654045

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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.