Variables | Studies included | Results | OR/WMD (95% CI) | I2 (%) | P value | |
ESD | SR | |||||
Sex (male) | 8 | 63.5% | 58.6% | 1.09 (0.90 to 1.31) | 0 | 0.39 |
Age (mean, years) | 7 | – | – | 0.26 (–0.43 to 0.95) | 46 | 0.46 |
Tumour size (mean, mm) | 4 | – | – | −0.87 (–2.44 to 0.69) | 0 | 0.27 |
Tumour location (L) | 8 | 58.4 | 49.0 | 1.26 (1.04 to 1.52) | 21 | 0.02 |
Histology of tumour (undifferentiated) | 6 | 62.1% | 73.6% | 0.83 (0.45 to 1.51) | 0 | 0.54 |
Morphology of tumour (flat or depressed) | 7 | 73.1% | 79.9% | 0.88 (0.69 to 1.13) | 3 | 0.33 |
Depth of invasion | 6 | 91.9% | 93.5% | 0.91 (0.60 to 1.39) | 0 | 0.67 |
L, the upper third of stomach; –, the age and tumour size results were continuous endpoints; and the mean and SD were used to calculate the WMD (age or size).
ESD, endoscopic submucosal dissection; SR, surgical resection; WMD, weighted mean difference.