Variable Odds Ratio (95% Confidence Interval) P-value
Diabetes mellitus 2.56 (1.1-5.9) 0.028
Previous heart disease 3.1 (1.4-6.8) 0.005
Mitral valve 2.1 (1.1-4.5) 0.046
Surgical treatment 0.45 (0.2-0.9) 0.044