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Adherence to medication according to sex and age in the CHARM programme
Bradi B Granger1, Inger Ekman, Christopher B Granger
1Duke University Health System, Duke University School of Nursing, Durham, NC 27710, USA. grang004@mc.duke.edu
Insights
Women with symptomatic heart failure, especially those under 75, showed lower medication adherence. Understanding these factors is key for improving treatment outcomes in heart failure patients.
Area of Science:
- Cardiology
- Pharmacology
- Public Health
Background:
- Medication adherence is crucial for heart failure management.
- Factors influencing adherence in heart failure patients are not fully understood.
- Previous studies suggest potential demographic influences on adherence.
Purpose of the Study:
- To investigate factors associated with medication adherence in heart failure patients.
- To specifically examine the roles of age and sex in adherence.
- To identify potential targets for adherence interventions.
Main Methods:
- Analysis of 7599 heart failure patients from the CHARM trial.
- Multivariable regression analysis to identify predictors of adherence.
- Adherence defined as taking >80% of study medication.
Main Results:
- Women were less adherent than men (87.3% vs. 89.8%, P=0.002), even after adjustment.
- Lower adherence was associated with higher all-cause mortality, irrespective of sex.
- Age, heart failure severity, medication count, and smoking were not linked to adherence.
Conclusions:
- Women, particularly those under 75, demonstrated reduced medication adherence in symptomatic heart failure.
- Identifying adherence barriers is essential for developing targeted interventions.
- Findings highlight sex and age as important considerations in heart failure medication management.
Aims:
Although many patients with heart failure have incomplete adherence to prescribed medications, predisposing factors remain unclear. This analysis investigates factors associated with adherence, with particular emphasis on age and sex.
Methods And Results:
A multivariable regression analysis of 7599 heart failure patients from the CHARM trial was done to evaluate factors associated with adherence. Adherence was measured as the proportion of time patients took more than 80% of study medication. The mean age was 66 years (SD 11) and 31.5% (n = 2400) were women. Women were slightly less adherent than men (87.3 vs. 89.8%, P = 0.002), even in adjusted, multivariable models (treatment, P = 0.006; placebo P = 0.004; and overall P < 0.001). However, all-cause mortality was lower in women (21.5%) than in men (25.3%) (adjusted hazard ratio, 0.77; 95% CI, 0.69-0.86; P < 0.001), but patients with a low adherence regardless of sex had a higher mortality. Age, severity of heart failure, number of medications, and smoking status were not associated with adherence.
Conclusion:
Women, particularly those <75 years of age, were less likely to be adherent in this large sample of patients with symptomatic heart failure. Understanding factors associated with adherence may provide opportunities for intervention.
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