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Table 4 Subgroup analysis of adverse events

From: Posterior pericardiotomy to prevent new-onset atrial fibrillation after coronary artery bypass grafting: a systematic review and meta-analysis of 10 randomized controlled trials

Adverse events after surgery Results of subgroup pool analysis P value
Early pericardial effusion RR: 0.28; 95% CI 0.15–0.50  < 0.0001
Late pericardial effusion RR: 0.06; 95% CI 0.02–0.16  < 0.00001
Pericardial tamponade RR: 0.08; 95% CI 0.02–0.33 0.0005
Length of stay in intensive care unit (ICU) MD: 0.91; 95% CI 0.57–1.24  < 0.00001
Pleural effusion RR: 1.51; 95% CI 1.19–1.92 0.0007
Length of hospitalization MD: − 0.45; 95% CI − 2.44–1.54 0.66
Pulmonary complications RR: 0.99; 95% CI 0.71–1.39 0.97
Revision for bleeding RR: 0.84; 95% CI 0.43–1.63 0.60
Intra-aortic balloon pump (IABP) usage RR: 1.00; 95% CI 0.61–1.65 1.00
Death RR: 0.45; 95% CI 0.07–3.03 0.41
  1. RR, risk ratio; MD, mean difference; CI, confidence interval