Morbimortality
The median hospital length of stay was 39 (Q1-Q3 30-49) days, varying from 41 (Q1-Q3 32-46) days in the clinical group and 38 (Q1-Q3 28-53) in the surgical one (p =0.485).
Overall all-cause in-hospital mortality was 41.9%, a rate significantly lower in patients who underwent a surgical procedure compared to those clinically managed (49.4% in clinical vs. 34.1% in surgical group;p =0.047).
On multivariate analysis (Table 6), diabetes mellitus (OR 2.56, 95% CI 1.1-5.9), previous structural heart disease (OR 3.1, 95% CI 1.4-5.9) and mitral valve infection (OR 2.1, 95% CI 1.1-4.5) were the predictors of in-hospital mortality. Surgical treatment was the only variable related to better outcome (OR 0.45; 95% IC 0.2-0.9).