[Clinical features and hospital complications of patients with acute coronary syndromes according to smoking habits]

Abstract

Background and objective: Current smoking patients with acute coronary syndromes (ACS) seem to have better prognosis during hospital stay. The objective of this study was to describe the clinical characteristics and complications of patients with ACS according to smoking habits.

Patients and methods: Observational, multicentre and nationwide registry. Primary endpoint was hospital mortality and secondary endpoint was the combination of mortality, angina or heart failure.

Results: 825 ACS patients were collected. Current smokers were 413 (50.1%) and their mean age was 12 years lower than the rest and also had lower prevalence of risk factors or previous cardiovascular disease. Complications and mortality were similar according to smoking habits. Multivariate adjusted analysis identified age > 75 (OR: 12.80, 95% CI 1.35-41.44; p=0.03) and GFR < 60 ml/min/1.73 m(2) (OR: 10.20, 95% CI 1.06-97.92; p=0.04) independently associated with mortality; age > 75 (OR: 1.72, 95% CI 1.03-2.84; p=0.04), GFR < 60 ml/min/1.73 m(2) (OR: 1.76, 95% CI 1.08-2.91; p=0.023) and current smoking (OR: 1.05, 95% CI 1.01-1.10; p=0.02) were independently associated with the combined end-point. Elderly current smokers patients had the highest mortality rate (19.0%) followed by elderly former smokers patients (5.8%).

Conclusions: Current smoker patients with ACS have lower mean age and have similar hospital complications.