Table 1.
Frequency of Patient Demographic and Preoperative Risk Factors for High-Risk Versus Non-High-Risk Patients Undergoing Mitral Valve Operations
| Factor | High Risk (n = 698) |
Non-High Risk (n = 1,742) |
p Value |
|---|---|---|---|
| Patient age (years) | 62 ± 14 | 58 ± 13 | <0.001 |
| Female | 352 (50.4%) | 850 (48.8%) | <0.001 |
| Hypertension | 468 (67.0%) | 887 (50.9%) | <0.001 |
| Diabetes | 164 (23.5%) | 186 (10.7%) | <0.001 |
| Stroke | 43.3 (6.2%) | 105 (6.0%) | <0.001 |
| Renal failure | 63 (9.0%) | 45 (2.6%) | <0.001 |
| Hemodialysis | 73 (10.5%) | 38 (2.2%) | <0.001 |
| Heart failure | 402 (57.6%) | 697 (40.0%) | <0.001 |
| NYHA class III or IV | 447 (64.0%) | 836 (48.0%) | <0.001 |
| Previous myocardial infarction | 125 (17.9%) | 65 (3.7%) | <0.001 |
| Ejection fraction | 0.50 [0.37–0.60] | 0.60 [0.53–0.65] | <0.001 |
| STS PROM (%) | 6.6 [1.5–15.3] | 1.8 [0.9–3.9] | <0.001 |
NYHA = New York Heart Association; PROM = Predicted Risk of Mortality; STS = The Society of Thoracic Surgeons.