Table 3.
Meta-Regression Examining Influence of the Inclusion of Propensity-Matched Studies Versus Unmatched Studies on Postoperative Outcomes.
| Outcomes | Regression coefficient | 95% CI | P value |
|---|---|---|---|
| Acute renal failure | −1.30 | −4.29 to 1.70 | 0.26 |
| Prolonged intubation | 0.31 | −2.31 to 2.92 | 0.66 |
| Blood transfusion | 0.57 | −9.54 to 10.68 | 0.61 |
| ICU length of stay | 1.51 | −3.20 to 6.21 | 0.30 |
| Hospital length of stay | 1.42 | −3.98 to 6.81 | 0.51 |
| Stroke | −0.60 | −2.78 to 1.57 | 0.44 |
| Respiratory infection | insufficient studies | — | — |
| Postoperative AF | −0.44 | −4.62 to 3.74 | 0.41 |
| Mortality | −0.59 | −28.72 to 27.54 | 0.83 |
| Reoperation for bleeding | −0.32 | −8.28 to 7.63 | 0.70 |
| Cross-clamp time | 4.15 | −21.68 to 29.98 | 0.70 |
| CPB time | 16.14 | −17.33 to 49.62 | 0.27 |
Abbreviations: AF, atrial fibrillation; CI, confidence interval; CPB, cardiopulmonary bypass; ICU, intensive care unit.