Table 2 Summary of the perioperative outcomes between U-VATS and M-VATS in this meta-analysis
Comparative outcomes | Number of studies | Study group | SMD/WMD/OR | 95%CI | P value | Heterogeneity (I2,P) | Meta-analysis model | |
|---|---|---|---|---|---|---|---|---|
Uniportal | Multiportal | |||||||
Intraoperative Outcomes | ||||||||
 Operation time | 18 | 1732 | 1967 | -0.04 | −0.33 ~ 0.26 | 0.81 | I2 = 94%, p < 0.01 | Random |
 Blood loss | 14 | 1374 | 1590 | −0.14 | − 0.35 ~ 0.06 | 0.18 | I2 = 86%, P < 0.01 | Random |
 Number of resected lymph nodes | 15 | 1391 | 1618 | 0.03 | −0.08 ~ 0.13 | 0.62 | I2 = 45%, p = 0.03 | Random |
 Conversion rate | 13 | 1375 | 1358 | 1.27 | 0.83 ~ 1.94 | 0.14 | I2 = 13%, P = 0.32 | Fixed |
Postoperative Outcomes | ||||||||
 Drainage duration | 18 | 1322 | 1411 | −0.13 | −0.27 ~ 0.02 | 0.09 | I2 = 68%, p < 0.01 | Random |
 Length of postoperative stay | 12 | 1219 | 1271 | −0.37 | −0.81 ~ 0.08 | 0.22 | I2 = 96%, p < 0.01 | Random |
 Pain in POD1 | 5 | 234 | 313 | −0.78 | −1.61 ~ 0.05 | 0.07 | I2 = 97%, p < 0.01 | Random |