Figure 3

Association between LVEF and 30-days survival in patients with HF alone. Modelling the association between LVEF and 30-days survival using logistic regression. LVEF was expanded into a restricted cubic spline with 4 knots, and covariate adjustment was made for age, sex, time from arrest to start of cardiopulmonary resuscitation (CPR), initial rhythm and witnessed status. CI = confidence interval; LVEF = left ventricular ejection fraction; OR = odds ratio.