Probability of heart failure with preserved EF = (Z / (1 + Z)) x 100 where Z = ey and

y = -9.1917 + 0.0451 x age + 0.1307 x BMI + 0.0859 x E/e' ratio + 0.0520 x pulmonary artery systolic pressure + 1.6997 x atrial fibrillation (1 for Yes and 0 for No)