Table 2 Pooled effect size and heterogeneity tests outcomes including IBL, TBL, postoperative drainage, postoperative hematological variables, postoperative blood transfusions, and complication using the random-effects model
Outcome | Study type | No. of studies | Effect size (95% CI) | I2 (%) | p-Heterogeneity | p-value |
|---|---|---|---|---|---|---|
IBL | RCT | 5 | 1.16 (0.38, 1.94) | 93 | < 0.0001 | 0.004 |
| Â | non-RCT | 1 | -0.26 (-0.78, 0.27) | NA | NA | 0.335 |
TBL | RCT | 2 | 0.52 (0.05, 0.99) | 72.1 | 0.058 | 0.03 |
| Â | non-RCT | 1 | -0.25 (-0.78, 0.27) | NA | NA | 0.341 |
Postoperative drainage | RCT | 3 | 0.54 (-0.06, 1.14) | 81.6 | 0.004 | 0.077 |
| Â | non-RCT | 1 | -0.07 (-0.59, 0.45) | NA | NA | 0.792 |
HB postoperative 1Â day | RCT | 1 | -1.214 (-1.807, -0.621) | NA | NA | 0 |
| Â | non-RCT | 0 | NA | NA | NA | NA |
HB postoperative 3 days | RCT | 2 | -2.301 (-5.937, 1.334) | 97.8 | < 0.0001 | 0.215 |
| Â | non-RCT | 0 | NA | NA | NA | NA |
HCT postoperative 1Â day | RCT | 1 | -0.381 (-0.929, 0.168) | NA | NA | 0.174 |
| Â | non-RCT | 0 | NA | NA | NA | NA |
HCT postoperative 3Â day | RCT | 3 | -0.766 (-1.443, -0.088) | 84.7 | 0.001 | 0.027 |
| Â | non-RCT | 0 | NA | NA | NA | NA |
Postoperative blood transfusions | RCT | 4 | 0.892 (0.470, 1.693) | 0 | 0.859 | 0.727 |
| Â | non-RCT | 0 | NA | NA | NA | NA |
Complications | RCT | 4 | 0.864 (0.309, 2.417) | 0 | 0.492 | 0.781 |
| Â | non-RCT | 0 | NA | NA | NA | NA |