Table 3. Subgroup analysis of multivariate Cox proportional hazard ratios for PMTR according to the history of open-heart surgery.
| No open-heart surgery (n = 358) | Open-heart surgery (n = 71) | |||
|---|---|---|---|---|
| HR (95% CI) | P value | HR (95% CI) | P value | |
| Age | 1.03 (0.98–1.05) | 0.395 | 1.07 (0.98–1.05) | 0.045 |
| Male sex | 0.84 (0.34–2.07) | 0.698 | 0.61 (0.34–2.07) | 0.529 |
| Atrial fibrillation | 1.91 (0.79–4.62) | 0.151 | 3.24 (0.87–12.06) | 0.080 |
| V pacing percentage | 1.00 (0.99–1.01) | 0.885 | 1.00 (0.98–1.02) | 0.948 |
| LVEF | 0.99 (0.95–1.04) | 0.827 | 1.03 (0.95–1.04) | 0.349 |
| LA volume index | 0.99 (0.96–1.01) | 0.313 | 0.99 (0.96–1.01) | 0.617 |
| RVEDA | 0.92 (0.83–1.02) | 0.101 | 1.02 (0.84–1.24) | 0.832 |
| RVFAC | 0.99 (0.95–1.04) | 0.717 | 1.01 (0.94–1.09) | 0.840 |
| TVAD/BSA | 1.12 (0.96–1.30) | 0.158 | 1.28 (0.98–1.65) | 0.065 |
| RVSP | 1.01 (0.97–1.06) | 0.554 | 1.02 (0.95–1.10) | 0.557 |
| TR | ||||
| No | Ref | Ref | Ref | |
| Grade 1 | 0.16 (0.03–0.77) | 0.022 | 1.60 (0.33–7.71) | 0.559 |
| Grade 2 | 0.01 (0.08-inf) | 0.997 | 1.54 (0.16–15.12) | 0.712 |
HR, hazard ratio; CI, confidence interval; LVEF, left ventricular ejection fraction; LA, left atrium; RVEDA, right ventricular end-diastole area; RVESA, right ventricular end-systole area; TVAD, tricuspid valve annular diameter; BSA, body surface area’ RVSP, right ventricular systolic pressure.