Table 2.
Multivariate meta-regression of primary outcomes according to temporal-spatial and methodological characteristics
| Variable | R0 resection rate |
en bloc resection rate |
||
|---|---|---|---|---|
| Coefficient | P | Coefficient | P | |
| Time period of the study | ||||
| ≤2015 | Reference | Reference | ||
| >2015 | -0.07 | 0.43 | -0.12 | 0.20 |
| Origin of study | ||||
| Asia | Reference | Reference | ||
| Western countries | 0.12 | 0.10 | -0.16 | 0.15 |
| Study design | ||||
| Prospective | Reference | Reference | ||
| Retrospective | -0.17 | 0.03† | 0.0022 | 0.98 |
| Sample size | ||||
| <50 | Reference | Reference | ||
| ≥50 | 0.13 | 0.18 | 0.01 | 0.90 |
| Resection with uplifting effect | ||||
| No | Reference | Reference | ||
| Yes | 0.11 | 0.21 | 0.26 | 0.17 |
| Resection with electrocautery | ||||
| No | Reference | Reference | ||
| Yes | -0.08 | 0.44 | 0.06 | 0.78 |
Positive meta-regression coefficients express an increased rate compared with the reference group. †statistically significant