SynthesisJournal of sleep research2026
Association Between Perioperative Sleep Disorders and Post-Operative Delirium in Cardiac Surgeries: A Systematic Review and Meta-Analysis.
Synthesis in Journal of sleep research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper, 1 of them a synthesis that pooled 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.
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.
Who cites it
1 citing paper in PubMed, 1 synthesis or guideline pooled it.
- Association Between Perioperative Sleep Disorders and Post-Operative Delirium in Cardiac Surgeries: A Systematic Review and Meta-Analysis.Journal of sleep research · 2026Pooled it
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Post-operative delirium (POD) is an acute deterioration in cognitive function and highly prevalent after cardiac surgery (CS; up to 55%). Perioperative sleep disorders (PSD) are also commonly noted in surgical patients (up to 60%). The primary aim of our systematic review is to determine the association between PSD and POD in CS patients during their hospital stay. We searched five databases (PubMed, CINAHL, Web of Science, Scopus, and EMBASE) to identify studies evaluating the association between PSD and POD amongst CS (any open-heart CS) patients, without time and geographic restriction. Original articles that focused on adults undergoing cardiac surgeries and assessed sleep and POD were included. We conducted a meta-analysis using a random effects model to determine the effect of sleep quality on POD. Thirty-three studies were included (63% observational designs); most studies originated from China (33%). The most frequently used subjective and objective sleep assessment tools were the Pittsburgh Sleep Quality Index (PSQI) (33%) and polysomnography (18%). After pooling observational data, we identified an incidence of POD ranging from 3.6% to 73%. Increased PSQI scores (standard threshold > 5) were associated with a greater likelihood of POD occurrence (standardised mean difference [SMD] = 0.73, p > 0.05). Lower total sleep time (SMD = -0.68, p < 0.05) was associated with an increased risk of POD. Poor sleep quality, insomnia, and sleep-disordered breathing are prevalent forms of PSD and are major risk factors for POD following CS. Additional research is warranted to clarify when sleep quality normalises after cardiac surgery and how targeted interventions can accelerate this recovery.
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Registered trials
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