Table 2.
Results of the meta-analysis.
| Outcomes | No. of studies |
Sample size | Heterogeneity | Overall effect size |
95% CI of overall effect |
P Value | ||
|---|---|---|---|---|---|---|---|---|
| R | L | I2(%) | P Value | |||||
| Operation time (min) | 9 | 1384 | 1382 | 95 | <0.00001 | WMD=5.19 | 18.00,39.82 | <0.00001 |
| Length of stay (days) | 9 | 1247 | 1249 | 95 | <0.00001 | WMD=2.97 | -1.60,–0.33 | 0.003 |
| Conversion | 10 | 1590 | 1583 | 0 | 0.63 | RR=3.62 | 0.40,0.76 | 0.0003 |
| Complications | 11 | 1418 | 1413 | 26 | 0.21 | RR=3.31 | 0.64,0.89 | 0.0009 |
| CRM+ | 6 | 1120 | 1105 | 0 | 0.81 | RR=1.94 | 0.49,1.00 | 0.05 |
| Proximal resection margin(cm) | 7 | 1082 | 1084 | 95 | <0.00001 | WMD=-1.14 | -1.16,0.31 | 0.25 |
| Distal resection margin(cm) | 6 | 908 | 911 | 92 | <0.00001 | WMD=2.16 | 0.04,0.94 | <0.00001 |
| Blood loss(ml) | 7 | 1098 | 1098 | 97 | <0.00001 | WMD=2.71 | -33.24,-5.35 | 0.007 |
| The number of harvested lymph nodes | 9 | 1391 | 1389 | 79 | <0.00001 | WMD=1.70 | -0.09,1.31 | 0.09 |
| The time of first flatus(days) | 7 | 996 | 1004 | 99 | <0.00001 | WMD=0.88 | -0.59,0.23 | 0.38 |
| The time of first autonomous urination(days) | 4 | 853 | 850 | 99 | <0.00001 | WMD=1.59 | -2.01,0.21 | 0.11 |
| The time of first defecation(days) | 2 | 652 | 658 | 64 | 0.10 | WMD=1.44 | -0.80,0.12 | 0.15 |
| The time of first resume diet(days) | 6 | 975 | 980 | 97 | <0.00001 | WMD=1.77 | -0.82,0.04 | 0.08 |
| Reoperation rates | 4 | 816 | 817 | 0 | 0.96 | RR=2.12 | 0.33,0.96 | 0.03 |
| Readmission rates | 4 | 816 | 817 | 4 | 0.37 | RR=1.45 | 0.41,1.14 | 0.15 |
| Death rates | 5 | 1083 | 1080 | 0 | 0.91 | RR=0.97 | 0.24,1.62 | 0.33 |
| Quality of TME:Complete | 8 | 1356 | 1354 | 5 | 0.39 | RR=2.76 | 1.01,1.08 | 0.006 |
| Quality of TME:Incomplete | 8 | 1356 | 1354 | 55 | 0.03 | RR=2.53 | 0.67,0.95 | 0.01 |