Table 3.

Predictive value of HRR among different EF groups

	HFrEF group (HR, 95% CI, p value)	HFpEF+HFmrEF group (HR, 95% CI, p value)	Total (972 people) (HR, 95% CI, p value)
HRRa	0.638 (0.575, 0.708, 0.000)	0.847 (0.775, 0.924, 0.000)	0.772 (0.724, 0.822, 0.000)
HRR <9.45	Reference	Reference	Reference
HRR ≥9.45	0.546 (0.381, 0.782, 0.001)	0.696 (0.507, 0.956, 0.025)	0.629 (0.500, 0.791, 0.000)

The multivariate Cox regression included 34 correction factors: sex, age, grade NYHA, previous history (coronary heart disease, hypertension, diabetes, peripheral vascular disease, atrial fibrillation), heart rate, QRS width, OT interval, LAd, LVDd, RAd, RVd, WBC, RBC, PLT, potassium, sodium, chloride, albumin, globulin, ALT, AST, TBIL, UA, eGFR, systolic BP, diastolic BP, BMI, lgBNP, lgD-dimer, and HRR.

^aRepresents HRR as a continuous variable, and the above HRR value is the reference.