Journal of General Internal Medicine

, Volume 23, Issue 12, pp 1940–1946

Patient Sex Does Not Modify Ejection Fraction as a Predictor of Death in Heart Failure: Insights from the APPROACH Cohort

  • Heidi N. Schmaltz
  • Danielle A. Southern
  • Colleen J. Maxwell
  • Merril L. Knudtson
  • William A. Ghali
  • for the APPROACH Investigators
Original Article

Abstract

BACKGROUND

Normal and low ejection fraction (EF) heart failure patients appear to have similar outcomes.

OBJECTIVE

The object of this study was to determine whether sex modifies the effects of left ventricular EF on prevalent heart failure mortality.

DESIGN

Prospective cohort study.

PATIENTS

Patients (n = 6, 095) with a diagnosis of heart failure and a measure of EF undergoing cardiac catheterization in Alberta, Canada between April 1999 and December 2004; follow-up continued through October 2005.

MEASUREMENTS

All-cause mortality was assessed in analyses stratified by patient sex and EF (≤50% vs. >50%).

MAIN RESULTS

Overall, female heart failure patients were older, had more hypertension, valvular disease, less systolic impairment and coronary artery disease. Baseline medication use was similar in the four sex-EF groups. Low EF heart failure mortality over 6.5 years was slightly higher but was not significantly modified by patient sex. This relationship remained unchanged after adjustment for differences in baseline characteristics and process of care (women normal EF, reference group; men normal EF adjusted HR 1.1, 95% CI 0.9–1.3; women low EF adjusted HR 1.5, 95% CI 1.1–2.0; men low EF adjusted HR 1.6, 95% CI 1.2–2.1).

CONCLUSIONS

Patient sex did not appear to modify the negative effects of low EF on long-term survival in this prospective study of prevalent heart failure. The small absolute difference in survival between low and normal EF heart failure highlights the need for further research into optimal therapy for the latter, a less well-understood condition.

KEY WORDS

heart failure ejection fraction sex differences prognosis death 

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Copyright information

© Society of General Internal Medicine 2008

Authors and Affiliations

  • Heidi N. Schmaltz
    • 1
    • 2
    • 5
  • Danielle A. Southern
    • 3
    • 4
  • Colleen J. Maxwell
    • 1
    • 3
    • 4
  • Merril L. Knudtson
    • 1
  • William A. Ghali
    • 1
    • 3
    • 4
  • for the APPROACH Investigators
  1. 1.Department of MedicineUniversity of CalgaryCalgaryCanada
  2. 2.Seniors’ HealthCalgary Health RegionCalgaryCanada
  3. 3.Department of Community Health SciencesUniversity of CalgaryCalgaryCanada
  4. 4.Centre for Health and Policy SciencesUniversity of CalgaryCalgaryCanada
  5. 5.Senior’s Health - Peter Lougheed HospitalCalgaryCanada

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