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Table 4 Sensitivity analysis for primary outcomes comparing percutaneous dilatational and surgical tracheostomy in critically ill patients

From: Percutaneous dilatational tracheostomy versus surgical tracheostomy in critically ill patients: a systematic review and meta-analysis

Outcome Subgroup No. of studies Estimate of OR 95% CI Test for between subgroup heterogeneity
Infection Allocation concealment     P = 0.65
  Yes 4 0.33 0.14–0.77  
  No 7 0.24 0.11–0.53  
  Method of PDT     P = 0.62
  Multiple dilator 9 0.24 0.13–0.47  
  Forceps 1 0.15 0.01–3.74  
  Translaryngeal 1 0.55 0.15–2.1  
  ST performed     P = 0.70
  ICU 2 0.49 0.12–1.99  
  OT 9 0.25 0.13–0.47  
  Use of Bronchoscope for PDT     P = 0.28
  Yes 5 0.40 0.18–0.89  
  No 6 0.20 0.09–0.46  
Bleeding Allocation concealment     P = 0.67
  Yes 5 0.85 0.46–1.41  
  No 5 0.71 0.26–1.94  
  Method of PDT     P = 0.33
  Multiple dilator 7 0.96 0.51–1.83  
  Forceps 1 1.7 0.15–20.17  
  Translaryngeal 1 0.08 0.004–1.37  
  Single dilator 1 1.5 0.06–39.24  
  ST performed     P = 0.009
  ICU 4 2.01 0.86–4.69  
  OT 6 0.29 0.12–0.75  
  Use of bronchoscope for PDT     P = 0.08
  Yes 5 1.36 0.65–2.84  
  No 5 0.34 0.12–0.92  
Mortality Allocation concealment     P = 0.86
  Yes 5 0.81 0.54–1.22  
  No 7 0.77 0.50–1.19  
  Method of PDT     P = 0.94
  Multiple dilator 9 0.80 0.57–1.11  
  Forceps 2 0.63 0.16–2.45  
  Translaryngeal 1 0.84 0.40–1.79  
  ST performed     P = 0.2
  ICU 3 1.09 0.61–1.97  
  OT 9 0.79 0.50–1.00  
  Use of bronchoscope for PDT     P = 0.52
  Yes 6 0.86 0.58–1.28  
  No 6 0.71 0.45–1.12  
  1. ICU, intensive care unit; OT, operating theatre; PDT, percutaneous dilatational tracheostomy; ST, surgical tracheostomy.