Outcome | Subgroup | No. of studies | Estimate of OR | 95% CI | Test for between subgroup heterogeneity |
---|---|---|---|---|---|
Infection | Allocation concealment | Â | Â | Â | 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 | Â | Â | Â | 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 | Â | Â | Â | 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 |  |