Evidence map›Paper›PMID 34244447›Full record

ArticleStroke and vascular neurology2021

Off-hour effect is not significant in endovascular treatment for anterior circulation large vessel occlusion in a multicentre registry.

Mingming Zha, Qingwen Yang, Shuo Liu, Kangmo Huang, Xiaohao Zhang, Min Wu, Haodi Cai, Qiushi Lv, Rui Liu, Dong Yang and 1 more

Abstract readMulticenter Study
In one paragraph

Article in Stroke and vascular neurology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed, 1 pooled it
–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

6 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Increased door-to-puncture time during off-duty hours results in poor treatment outcomes for acute ischemic stroke: A subanalysis of the K-NET registry.Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences · 2026
    Article
  3. Article
  4. Article
  5. Review
  6. 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

11 authors.

Mingming Zha *Department of Neurology, Southeast University, Nanjing, Jiangsu, China.ORCID 0000-0001-7208-1514
Qingwen Yang *Department of Neurology, Southeast University, Nanjing, Jiangsu, China.ORCID 0000-0002-9746-8317
Shuo Liu *Department of Internal Medicine, Southeast University, Nanjing, Jiangsu, China.
Kangmo HuangDepartment of Neurology, Medical School of Nanjing University, Nanjing, Jiangsu, China.
Xiaohao ZhangDepartment of Neurology, Medical School of Nanjing University, Nanjing, Jiangsu, China.
Min WuDepartment of Neurology, Southern Medical University, Guangzhou, Guangdong, China.
Haodi CaiDepartment of Neurology, Southeast University, Nanjing, Jiangsu, China.
Qiushi LvDepartment of Neurology, Nanjing Jinling Hospital, Nanjing, Jiangsu, China.
Rui LiuDepartment of Neurology, Nanjing Jinling Hospital, Nanjing, Jiangsu, China.
Dong Yang *Department of Neurology, Nanjing Jinling Hospital, Nanjing, Jiangsu, China xfliu2@vip.163.com yangdongchina@yeah.net.
Xinfeng Liu *Department of Neurology, Southeast University, Nanjing, Jiangsu, China xfliu2@vip.163.com yangdongchina@yeah.net.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

background and purposeWhether the off-hour effect has an impact on workflow and outcomes of endovascular treatment (EVT) for anterior circulation large vessel occlusion (AC-LVO) remains uncertain. This study aimed to compare the characteristics and outcomes of patients who presented or were treated during off-hour versus on-hour in a multi-center registry.

methodsAC-LVO patients from 21 centres were categorised into the off-hour group and the on-hour group. Off-hour (weekends, holidays, and 18:00-7:59 on weekdays) and on-hour (8:00-17:59 on weekdays except for holidays) were defined according to arrival and groin-puncture time points, respectively. Subgroup comparisons between patients both arrived and treated during off-hour (true off-hour) and on-hour (true on-hour) were performed. The primary outcome was the 90-day modified Rankin Scale (mRS) score. Secondary outcomes included favourable outcome (mRS 0-2 at 90 days), EVT-related time metrics, and other clinical outcomes. Ordinary and binary logistic regression and linear regression were taken to adjust for confounding factors.

resultsOf all 698 patients enrolled, 435 (62.3%) and 456 (65.3%) patients were categorised into the off-hour arrival and off-hour puncture group, respectively. Shorter onset to door time (adjusted ß coefficient: -21.56; 95% CI -39.96 to -3.16; p=0.022) was noted in the off-hour arrival group. Ordinal and dichotomous mRS scores at 90 days were comparable between the off-hour group and the on-hour group regardless of off-hour definitions. Other time metrics and outcomes were comparable between the two groups. Of 595 patients both presented and were treated during off-hour or on-hour, 394 patients were categorised into the true off-hour group and 201 into the true on-hour group. Time metrics and clinical outcomes were similar between the true off-hour and the true on-hour group.

conclusionsThe off-hour effect was not significant regarding clinical outcomes and in-hospital workflow in AC-LVO patients receiving EVT in this Chinese multicentre registry.

Indexed as

Endovascular ProceduresStrokeHumansRegistriesThrombectomyTreatment Outcomestrokethrombectomy

Identifiers

PMID34244447
PMCPMC8717780

What OpenQuestion holds

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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.