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Heart failure and left ventricular function
Long-term trends in 30-day mortality of hospitalised patients with heart failure: between 1993 and 2007
  1. Qiaoxiang Yin1,
  2. Yusheng Zhao2,
  3. Xiaoping Hou1
  1. 1Department of Elderly Cardiology, Chinese General Hospital of Air Force, Beijing, China
  2. 2Institute of Geriatric Cardiology, Chinese PLA General Hospital, Beijing, China

Abstract

Objective To examine long-term trends in hospital mortality, and length of stay of patients hospitalised with congestive heart failure (CHF).

Methods A retrospective study was performed in 7319 patients (4543 males, 2776 females) with a validated primary discharge diagnosis of HF hospitalised from 1 January 1993, through 31 December 2007. Hospital mortality, length of stay and were examined for patients.

Results During the 15-year period studied, the age of the patients with CHF showed an increase (p=0.000). The length of stay exhibited a downward trend (p=0.000) In-hospital 30-day mortality decreased from 7.0% in 1993–1997 to 4.5% in 1998–2002 to 5.1% in 2003–2007 (p=0.002). There was no significant difference in the gender of the patients with CHF. Hospital mortality of myocardial infarction and valve heart disease associated with CHF decreased deeply (p<0.01). Kaplan–Meier survival curves showed hospital mortality associated with the study period (1998–2002 vs 1993–1997, HR 0.71, 95% CI 0.55 to 0.93, p=0.013); (2003–2007 vs 1993–1997, HR 0.59, 95% CI 0.46 to 0.76, p<0.001).

Conclusion After risk adjustment for age, significant decrease in-hospital mortality was observed during the study period. This decline in-hospital mortality occurred in parallel with decreasing length of stay and increasing age of patients with HF.

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