The risks of re-hospitalization of patients with heart failure with prolonged follow-up in a specialized center for the treatment of heart failure and in real clinical practice.

Relevance The number of patients with functional class III-IV chronic heart failure (CHF) characterized by frequent rehospitalization for acute decompensated HF (ADHF) has increased. Rehospitalizations significantly increase the cost of patient management and the burden on health care system.
Objective To determine the effect of long-term follow-up at a specialized center for treatment of HF (Center for Treatment of Chronic Heart Failure, CTCHF) on the risk of rehospitalization for patients after ADHF.

Materials and Methods The study successively included 942 patients with CHF after ADHF. Group 1 consisted of 510 patients who continued the outpatient follows-up at the CTCHF, and group 2 included 432 patients who refused of the follow-up at the CTCHF and were managed at outpatient clinics at their place of residence. CHF patient compliance with recommendations and frequency of rehospitalization for ADHF were determined by outpatient medical records and structured telephone calls. A rehospitalization for ADHF was recorded if the patient stayed for more than one day in the hospital and required intravenous loop diuretics. The follow-up period was two years. Statistical analyses were performed using a Statistica 7.0 software for Windows, SPSS, and a R statistical package.

Results Patients of group 2 were significantly older, more frequently had FC III CHF and less frequently had FC I CHF than patients of group 1. Both groups contained more women and HF patients with preserved ejection fraction. Using the method of binary multifactorial logit-regression a mathematical model was created, which showed that risk of rehospitalization during the entire follow-up period did not depend on age and sex but was significantly increased 2.4 times for patients with FC III-IV CHF and 3.4 times for patients of group 2. Multinomial multifactorial logit-regression showed that the risk of one, two, three or more rehospitalizations within two years was significantly higher in group 2 than in group 1 (2.9–4.5 times depending on the number of rehospitalizations) and for patients with FC III-IV CHF compared to patients with FC I-II CHF (2–3.2 times depending on the number of rehospitalizations). Proportion of readmitted patients during the first year of follow-up was significantly greater in group 2 than in group 1 (55.3 % vs. 39.8 % of patients [odd ratio (OR) =1.9; 95% confidence interval (CI), 1.4–2.4; р<0.001]; during the second year, the proportion was 67.4 % vs. 28.2 % (OR=5.3; 95 % CI, 3.9–7.1; р<0.001). Patients of group 1 were readmitted more frequently during the first year than during the second year (р<0,001) whereas patients of group 2 were readmitted more frequently during the second than the first year of follow-up (р<0.001). Total proportion of readmitted patients for two years of follow-up was significantly greater in group 2 (78.0 % vs. 50.6 %) (OR=3.5; 95 % CI, 2.6–4.6; р<0.001). Reasons for rehospitalizations were identified in 88.7 % and 45.9 % of the total number of readmitted patients in groups 1 and 2, respectively. The main cause for ADHF was non-compliance with recommendations in 47.4 % and 66.7 % of patients of groups 1 and 2, respectively (р<0.001).

Conclusion Follow-up in the system of specialized health care significantly decreases the risk of rehospitalization during the first and second years of follow-up and during two years in total for both patients with FC I-II CHF and FC III-IV CHF. Despite education of patients, personal contacts with medical personnel, and telephone support, main reasons for rehospitalization were avoidable.

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