Evidence map›Paper›PMID 40336057›Full record

ArticleJournal of intensive care2025

The effects of prolonged prone positioning on response and prognosis in patients with acute respiratory distress syndrome: a retrospective cohort study.

Yuhang Yan, Junying Bao, Shumin Cai, Xiangning Zhong, Bingxuan Geng, Jingyi Liang, Zhiya Deng, Zhongqing Chen, Zaisheng Qin, HongBin Hu and 1 more

Abstract read
In one paragraph

Article in Journal of intensive care, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed, 3 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

9 citing papers in PubMed, 3 syntheses or guidelines pooled it.

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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

11 authors.

Yuhang Yan *Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
Junying Bao *Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
Shumin Cai *Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
Xiangning ZhongDepartment of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
Bingxuan GengDepartment of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
Jingyi LiangDepartment of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
Zhiya DengDepartment of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
Zhongqing ChenDepartment of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
Zaisheng QinDepartment of Anesthesiology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China. qzsmzk@163.com.
HongBin HuDepartment of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China. hobewoos@163.com.
Zhenhua ZengDepartment of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China. zhenhuazeng.2008@163.com.

Funding

Basic and Applied Basic Research Foundation of Guangdong Province 2021A1515111028Basic and Applied Basic Research Foundation of Guangdong Province 2021A1515220003Initiative Project of Clinical Research of Southern Medical University 2023CR018National Natural Science Foundation of China 82302411Science and Technology Program of Guangzhou 2025A04J4187
6 · The paper itself

Abstract

backgroundProne positioning improves outcomes in patients with acute respiratory distress syndrome (ARDS), but the optimal duration in critical care settings remains uncertain. This study aims to evaluate the investigates the impact of prone ventilation duration on clinical outcomes.

methodsThis retrospective study was conducted on ARDS patients admitted to the intensive care unit (ICU), Nanfang hospital of Southern Medical University, who received prone positioning. Patients were categorized into two groups: the prolonged prone positioning (PPP) (≥ 16 h) group and the standard prone positioning (SPP) (< 16 h) group. Propensity score matching (PSM) was employed to balance baseline characteristics. Cox proportional hazards, regression models were utilized to evaluate the association between the prone duration and clinical outcomes. Kaplan-Meier survival curves were generated to compare 28-day mortality, with log-rank tests analyzing differences. Restricted cubic spline (RCS) were applied to investigate the time-response between prone duration, PaCO₂, PaO₂, positive end-expiratory pressure, response rate, and 28-day mortality. In addition, the incidence of prone position-related complications was assessed in both groups.

resultsA total of 234 patients with ARDS were included, with an overall 28-day mortality of 49.1% (115/234). After PSM, 81 matched pairs were compared. The PPP group had lower 28-day mortality (46.9% vs. 53.1%; hazard ratios (HR): 0.53; 95% CI 0.32-0.85; P = 0.033) and improved prone positioning response rate [70.5% vs. 60.5%; odds ratio (OR): 1.46; 95% CI 1.23-1.89; P = 0.025]. RCS analysis suggested a reduction in mortality with prone durations ≥ 16 h, and longer durations correlated with better prone response. However, no significant association was found between PPP and reduced ICU or hospital length of stay. RCS analysis indicated a gradual decrease in 28-day mortality with increasing duration of prone positioning, and longer duration were associated with a higher likelihood of a prone response. There were no significant differences in prone ventilation-related complications between the two groups.

conclusionsPPP (≥ 16 h) is associated with reduced 28-day mortality and improved response rates in ICU patients with ARDS, without increasing complication risks. Prospective studies are needed to further validate these results.

Indexed as

Acute respiratory distress syndromeIntensive care unitPrognosisProlonged prone positionResponse rates

Identifiers

PMID40336057
PMCPMC12057286

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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.