Table 1. Meta-analysis for intraoperative data.
| Outcomes | No. of studies | No. of patients | McKeown’s events incidence (%) | Ivor Lewis’s events incidence (%) | WMD/OR (95% CI) | Heterogeneity | Test for overall effect | Favors group |
|---|---|---|---|---|---|---|---|---|
| Operating time | 20 | 3,478 | – | – | 23.69 (6.26, 41.12) | I2=98%, P<0.00001 | Z=2.66, P=0.008 | Ivor Lewis |
| Blood loss | 18 | 3,005 | – | – | 7.73 (−2.21, 17.59) | I2=71%, P<0.00001 | Z=1.54, P=0.12 | – |
| Examined lymph nodes | 17 | 4,231 | – | – | 0.69 (−0.62, 2.01) | I2=87%, P<0.00001 | Z=1.03, P=0.30 | – |
| R0 resection | 5 | 2,095 | 97.2% | 96.8% | 1.07 (0.63, 1.80) | I2=0%, P=0.67 | Z=0.24, P=0.81 | – |
| Conversion to open | 3 | 1,616 | 4.5% | 3.6% | 1.32 (0.80, 2.18) | I2=0%, P=0.92 | Z=1.08, P=0.28 | – |
| Blood transfusion | 5 | 984 | 3.5% | 5.0% | 0.79 (0.41, 1.50) | I2=0%, P=0.54 | Z=0.73, P=0.46 | – |
WMD, weighted mean difference; OR, odds ratio; CI, confidence interval.