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The effectiveness of beta-blockers in women with congestive heart failure
Golyar Keyhan1, Shun-Fu Chen, Louise Pilote
1Division of Clinical Epidemiology, The Research Institute of the McGill University Health Center, 1650 Cedar Avenue, Rm L10-421, Montreal, Quebec, Canada, H3G 1A4.
Insights
Beta-blockers improve survival in patients with congestive heart failure (CHF). This study found similar survival benefits for women and men using beta-blockers for CHF, highlighting the need for more research in women.
Area of Science:
- Cardiology
- Pharmacology
- Geriatric Medicine
Background:
- Beta-blockers are established treatments for congestive heart failure (CHF).
- Limited research exists on beta-blocker efficacy specifically in female CHF patients.
- This study addresses the gap in understanding treatment effects in women.
Purpose of the Study:
- To evaluate the effectiveness of beta-blockers in improving survival for women with CHF.
- To compare the survival benefits of beta-blockers between men and women diagnosed with CHF.
Main Methods:
- Retrospective cohort study utilizing administrative healthcare databases in Quebec, Canada.
- Included over 27,000 patients aged 65+ discharged with CHF between 1998 and 2003.
- Compared survival outcomes between beta-blocker users and non-users, with follow-up data until March 2004.
Main Results:
- Beta-blocker use demonstrated a significant survival benefit in both women (HR 0.79) and men (HR 0.76).
- Sensitivity analyses confirmed similar survival advantages across sexes after adjusting for selection bias.
- Women were older and had more hypertension; men had higher rates of myocardial infarction.
Conclusions:
- Beta-blockers appear to offer comparable survival improvements for women and men with CHF.
- Further clinical trials with substantial female participation are essential to confirm these findings.
- Current evidence suggests beta-blockers are beneficial for women with congestive heart failure.
Background:
Beta-blockers have been shown to improve survival in patients with congestive heart failure (CHF). However, few studies have looked at the effects of these medications specifically in women.
Objective:
To determine the effectiveness of beta-blockers in women with CHF.
Patients:
We conducted a retrospective cohort study that used administrative databases of all patients >65 years of age discharged with a diagnosis of CHF between January 1998 and March 2003 in Quebec, Canada. Follow-up information was available until March 31, 2004.
Method:
The cohort included 27,837 patients. Subjects with filled prescription for a beta-blocker (14,083 users) were compared with those who never filled such prescription (12,254 nonusers). The primary outcome was survival in women and men by beta-blocker use.
Results:
There were 14,693 women (52% were prescribed beta-blockers) and 13,144 men (49% were prescribed beta-blockers). Women were older and had more hypertension, whereas men had more myocardial infarction. There was a significant survival benefit with beta-blockers use in both sexes (hazard ratio [HR] 0.79, 95% confidence interval [CI] 0.75-0.83 in women, and 0.76, 95% CI 0.72-0.80 in men). Sensitivity analyses adjusting for selection bias showed similar survival benefits in both sexes. Overall, men had a worse survival than women (HR 1.2, 95% CI 1.2-1.3 in men).
Conclusions:
Beta-blockers appear to improve survival from CHF as much in women as in men. Clinical trials involving large numbers of women are necessary to demonstrate potential treatment benefits.
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