Risk of Heart Failure and Death After Prolonged Smoking Cessation: Role of Amount and Duration of Prior Smoking.

Academic Article

Abstract

  • BACKGROUND: According to the 2004 Surgeon General's Report on Health Consequences of Smoking, after >15 years of abstinence, the cardiovascular risk of former smokers becomes similar to that of never-smokers. Whether this health benefit of smoking cessation varies by amount and duration of prior smoking remains unclear. METHODS AND RESULTS: Of the 4482 adults ≥65 years without prevalent heart failure (HF) in the Cardiovascular Health Study, 2556 were never-smokers, 629 current smokers, and 1297 former smokers with >15 years of cessation, of whom 312 were heavy smokers (highest quartile; ≥32 pack-years). Age-sex-race-adjusted hazard ratios (aHR) and 95% confidence intervals (CI) for centrally adjudicated incident HF and mortality during 13 years of follow-up were estimated using Cox regression models. Compared with never-smokers, former smokers as a group had similar risk for incident HF (aHR, 0.99; 95% CI, 0.85-1.16) and all-cause mortality (aHR, 1.08; 95% CI, 0.96-1.20), but former heavy smokers had higher risk for both HF (aHR, 1.45; 95% CI, 1.15-1.83) and mortality (aHR, 1.38; 95% CI, 1.17-1.64). However, when compared with current smokers, former heavy smokers had lower risk of death (aHR, 0.64; 95% CI, 0.53-0.77), but not of HF (aHR, 0.97; 95% CI, 0.74-1.28). CONCLUSIONS: After >15 years of smoking cessation, the risk of HF and death for most former smokers becomes similar to that of never-smokers. Although this benefit of smoking cessation is not extended to those with ≥32 pack-years of prior smoking, they have lower risk of death relative to current smokers.
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    Keywords

  • heart failure, mortality, smoking, Aged, Aged, 80 and over, Chi-Square Distribution, Female, Heart Failure, Humans, Incidence, Male, Multivariate Analysis, Prognosis, Proportional Hazards Models, Prospective Studies, Risk Assessment, Risk Factors, Smoking, Smoking Cessation, Smoking Prevention, Time Factors, United States
  • Digital Object Identifier (doi)

    Author List

  • Ahmed AA; Patel K; Nyaku MA; Kheirbek RE; Bittner V; Fonarow GC; Filippatos GS; Morgan CJ; Aban IB; Mujib M
  • Start Page

  • 694
  • End Page

  • 701
  • Volume

  • 8
  • Issue

  • 4