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Abstract Aims Heart failure (HF) and chronic kidney disease (CKD) place significant challenges on the healthcare system, and their co‐existence is associated with shared adverse outcomes. The multinational CaReMe project was initiated to provide contemporary, real‐world epidemiological data on cardiovascular and reno‐metabolic diseases. Utilizing data from the German CaReMe cohort, we characterize a multicentric HF population and describe in‐hospital outcomes stratified for co‐morbid CKD. Methods and results This retrospective, observational study analysed administrative data from inpatient cases hospitalized in 87 German Helios hospitals between 1 January 2016 and 31 August 2022. The first hospitalization of patients aged ≥18 years with a primary discharge diagnosis of HF, based on ICD‐10 codes, were considered the index cases, and subsequent hospitalizations were considered as readmissions. Baseline characteristics and outcomes were stratified for co‐morbid CKD using ICD‐10‐encoding from the index cases. Cox regression was utilized for readmission endpoints and in‐hospital mortality. In total, 174 829 index cases (mean age 79 ± 15 years, 49.9% female) were included; of these, 55.0% had coexisting CKD. Patients with CKD were older, suffered from worse HF‐related symptoms, had a higher co‐morbidity burden, and in‐hospital mortality was increased at index and during follow‐up. Prevalent CKD was associated with higher rehospitalization rates and was an independent predictor for in‐hospital death. Conclusions Within this HF inpatient cohort from a multicentric German database, CKD was diagnosed in more than half of the patients and was associated with increased in‐hospital mortality at baseline and during follow‐up. Rehospitalizations were observed earlier and more frequently in patients with HF and co‐morbid CKD. |
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