Evidence map›Paper›PMID 42213118›Full record

Observational studySurgery today2026

Pre-weekend effect in pulmonary resection for non-small cell lung cancer: a multicenter retrospective cohort study.

Masatsugu Hamaji, Sota Miyamoto, Takashi Sozu, Akihiro Ohsumi, Masashi Kobayashi, Tatsuo Nakagawa, Makoto Sonobe, Akihiro Aoyama, Masashi Ishikawa, Hiroaki Sakai and 4 more

Abstract readMulticenter StudyObservational Study
PubMed Publisher
In one paragraph

Observational study in Surgery today, 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

14 authors.

Masatsugu Hamaji *Department of Thoracic and Cardiovascular Surgery, Nara Medical University, 840 Shijo-cho, Kashihara, 634-8511, Nara, Japan. mhamaji@kuhp.kyoto-u.ac.jp.
Sota Miyamoto *Department of Information and Computer Technology, Faculty of Engineering, Tokyo University of Science, Tokyo, Japan.
Takashi SozuDepartment of Information and Computer Technology, Faculty of Engineering, Tokyo University of Science, Tokyo, Japan.
Akihiro OhsumiDepartment of Thoracic Surgery, Kitano Hospital, Osaka, Japan.
Masashi KobayashiDepartment of Thoracic Surgery, Kurashiki Central Hospital, Kurashiki, Japan.
Tatsuo NakagawaDepartment of Thoracic Surgery, Tenri Hospital, Tenri, Japan.
Makoto SonobeDepartment of Thoracic Surgery, Osaka Red Cross Hospital, Osaka, Japan.
Akihiro AoyamaDepartment of Thoracic Surgery, Kyoto Katsura Hospital, Kyoto, Japan.
Masashi IshikawaDepartment of Thoracic Surgery, Japanese Red Cross Wakayama Medical Center, Wakayama, Japan.
Hiroaki SakaiDepartment of Thoracic Surgery, Amagasaki General Medical Center, Amagasaki, Japan.
Ryo MiyaharaDepartment of Thoracic Surgery, Kyoto City Hospital, Kyoto, Japan.
Toshi MenjuDepartment of Thoracic Surgery, Kyoto University, Kyoto, Japan.
Hiroshi DateDepartment of Cardiovascular and Thoracic Surgery, Duke University, Durham, USA.
Toyofumi Fengshi Chen-YoshikawaDepartment of Thoracic Surgery, Kyoto University, Kyoto, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeSurgeries performed on Fridays may be associated with an increased risk of postoperative complications. However, data on pulmonary resection for non-small cell lung cancer (NSCLC) are lacking. This study aimed to evaluate the outcomes of pulmonary resection for NSCLC performed on Fridays or before holidays.

methodsWe performed a retrospective chart review to identify patients with NSCLC who underwent pulmonary resection between 2014 and 2016. Patients were classified into two groups: those undergoing surgery on Fridays or the day before a public holiday (pre-weekend group) and those undergoing surgery on other weekdays (control group). Propensity score matching (1:1 ratio) was performed to compare intraoperative injury, any postoperative complication, grade ≥ 3 complications, overall survival (OS), and recurrence-free survival (RFS).

resultsThe risk ratios were 0.70 (95% confidence interval [CI]: 0.27-1.82) for intraoperative injuries, 0.93 (95%CI: 0.70-1.22) for any postoperative complications, and 0.54 (95%CI: 0.32-0.93) for grade ≥ 3 complications. The hazard ratio was 0.91 (95%CI: 0.64-1.29) for OS and 0.99 (95%CI: 0.75-1.30) for RFS.

conclusionsElective pulmonary resection for NSCLC performed on Fridays or before holidays may not be associated with increased postoperative complications or worse long-term outcomes.

Indexed as

Carcinoma, Non-Small-Cell LungLung NeoplasmsPneumonectomyPostoperative ComplicationsAgedCohort StudiesFemaleHumansIntraoperative ComplicationsMaleMiddle AgedPropensity ScoreRetrospective StudiesRiskTime FactorsTreatment OutcomeLung cancer surgeryMinimally invasive surgeryPropensity matchingStatistics

Identifiers

PMID42213118

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.