Table 3 Subgroup analyses of TDTs placement and anastomotic leakage after rectal cancer surgery risk
Group | Studies (n) | RR (95% CI) | P | Heterogeneity test | |
|---|---|---|---|---|---|
P | I2 (%) | ||||
Total | 7 | 0.89(0.57–1.37) | 0.58 | 0.05 | 52 |
Design | |||||
 Randomized controlled trials | 4 | 0.84(0.49–1.45) | 0.53 | 0.11 | 51 |
 Non-randomized controlled trials | 1 | 0.27(0.06–1.27) | 0.10 | NA | NA |
 Prospective Cohort study | 2 | 1.26(0.70–2.27) | 0.45 | 0.23 | 32 |
Area | |||||
 Asia | 5 | 0.68(0.47–1.00) | 0.05 | 0.39 | 3 |
 Europe | 2 | 1.61(1.03–2.52) | 0.04 | 0.85 | 0 |
Publication year | |||||
  ≤ 2015 | 3 | 0.64(0.21–1.96) | 0.43 | 0.02 | 74 |
  > 2015 | 4 | 1.08(0.75–1.53) | 0.69 | 0.36 | 7 |
Quality score | |||||
  ≤ 7 | 3 | 0.89(0.38–2.08) | 0.78 | 0.07 | 62 |
  > 7 | 4 | 0.84(0.49–1.45) | 0.53 | 0.11 | 51 |