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Published on: November 10, 2017
Adherence to lipid-lowering agents among 11,042 patients in clinical practice
M C S Wong1, J Y Jiang, S M Griffiths
1Faculty of Medicine, School of Public Health and Primary Care, Chinese University of Hong Kong, Hong Kong.
Insights
Adherence to lipid-lowering agents is high in Hong Kong, particularly among older patients and those with comorbidities. Younger patients and those without comorbidities require closer monitoring for medication adherence.
Area of Science:
- Cardiology
- Public Health
- Pharmacoeconomics
Background:
- Dyslipidemia management is often suboptimal due to poor patient adherence to medication.
- Effective strategies to improve adherence are crucial for cardiovascular disease prevention.
Purpose of the Study:
- To assess medication adherence rates to lipid-lowering agents in a large Chinese population.
- To identify factors associated with optimal adherence to lipid-lowering medications.
Main Methods:
- Utilized a validated clinical database of patients refilling prescriptions in Hong Kong public primary care clinics (Jan 2004 - June 2007).
- Employed Medication Possession Ratio (MPR) to measure drug adherence, with MPR ≥ 0.8 defined as optimal.
- Conducted multivariate regression analysis to determine factors associated with optimal adherence.
Main Results:
- Out of 11,042 eligible patients, 90% demonstrated optimal adherence (MPR ≥ 0.8).
- Older age (50+ years), attendance at family medicine specialist clinics, follow-up visits, and presence of comorbidities were significantly associated with higher adherence.
- Adjusted odds ratios indicated increased likelihood of adherence with advancing age and number of comorbidities.
Conclusions:
- Findings suggest that older patients and those with comorbidities are more likely to adhere to lipid-lowering medications.
- Younger patients, new patients, and those without comorbidities may require targeted interventions and closer monitoring for medication adherence.
- Further research is recommended to explore reasons for non-adherence in specific patient groups.
Aims:
Dyslipidaemia is a poorly-controlled condition in clinical practice largely because of poor adherence to medication regimens by patients. This study evaluated the levels of and factors associated with adherence to lipid-lowering agents in a large Chinese population.
Methods:
From a validated clinical database, we included all patients who attended any public, primary care clinics in one large Territory of Hong Kong for medication refill at least twice during the study period January 2004 to June 2007. The major outcome variable was Medication Possession Ratio (MPR), an internationally-recognised metric to measure drug adherence. The factors associated with optimal drug adherence (MPR ≥ 0.8) were evaluated by multivariate regression analysis.
Results:
From 11,042 eligible patients, 90% were adherent. After adjusting for patients' age, gender, socioeconomic status, service type, district of residence, visit type (new visits vs. follow-up visits), the number of comorbidities and the drug class (statin vs. fibrates), older patients [aged 50-59 years; adjusted odds ratio (AOR) 1.30, p = 0.009; 60-69 years; AOR 1.53, p < 0.001; ≥ 70 years; AOR 1.72, p < 0.001], attendance in family medicine specialist clinics (FMSC; AOR 1.56, p < 0.001), follow-up visits (AOR 2.93, p < 0.001) and the presence of comorbidities (one comorbidity; AOR 1.45, p < 0.001; ≥ 2 comorbidities; AOR 1.56, p < 0.001) were associated with optimal drug adherence.
Discussion And Conclusion:
These findings carry an implication that younger subjects, new patients, visitors in clinics other than FMSC and those without comorbidities should receive more meticulous monitoring of their medication-taking behaviour. Future studies should evaluate the major reasons for non-adherence among them.
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