“…101,102,188,189 The contribution of comorbidities to patients' outcomes may be similar in patients with HFrEF, compared with those with HFpEF, 189 or be larger in those with HFpEF according to other analyses. 132 The most frequent noncardiac comorbidities include chronic kidney disease, 21,32,134,[190][191][192][193] , chronic obstructive pulmonary disease, 194 central nervous system abnormalities, 195 sleep disordered breathing, 196,197 diabetes mellitus, 65,198,199 cancer, 188,200 and iron deficiency. 60,61,63,201 They were all shown to have a major impact on clinical presentation, response to treatment and outcomes.…”