There was a correlation between cognitive impairment and age (OR = 1.079, 95% CI: 1.03 - 1.132); Marital status: single, widowed or divorced (OR = 3.009, 95% CI: 1.119 - 8.099); Left ventricular ejection fraction <40% (OR = 7.571, 95% CI: 2.703 - 21.208).