Table 3. Summary of the PSS in the uniportal and three-port VATS groups.
| Endpoint analysis | No. of studies | Mean | SMD (95% CI) | P value | I2het | Phet | Model |
|---|---|---|---|---|---|---|---|
| At 24 h | 2 | 1.90 vs. 2.55 | −0.81 (−1.21, −0.41) | <0.0001 | 0% | 0.96 | Fixed |
| At 48 h | 2 | 2.36 vs. 2.83 | −0.69 (−1.08, −0.29) | 0.0007 | 0% | 0.73 | Fixed |
| At 72 h | 2 | 2.33 vs. 2.44 | −0.13 (−0.52, 0.25) | 0.50 | 0% | 0.91 | Fixed |
VATS, video-assisted thoracoscopic surgery; No, number; SMD, standardized mean differences; 95% CI, 95% confidence interval; I2het, I2 test for heterogeneity; Phet, P for heterogeneity; h, hour; Fixed, fixed effect model.