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ADHD and adherence to antihypertensive medication treatment: a multinational cohort study
Honghui Yao1, Yiling Zhou2, Lin Li1
1Department of Medical Epidemiology and Biostatistics, Karolinska Institute, Nobels Väg 12A, 171 65, Stockholm, Sweden.
Insights
Adults with attention-deficit/hyperactivity disorder (ADHD) are more likely to stop taking blood pressure medication. However, ADHD medication may improve adherence to these essential treatments.
Area of Science:
- Cardiology
- Neuroscience
- Pharmacology
Background:
- Antihypertensive medication adherence is crucial for managing hypertension and preventing cardiovascular disease.
- Attention-deficit/hyperactivity disorder (ADHD) is linked to cardiovascular issues, including hypertension.
- The impact of ADHD and its treatments on antihypertensive medication adherence remains unclear.
Purpose of the Study:
- To investigate the association between ADHD and antihypertensive medication discontinuation and adherence.
- To explore the role of ADHD medication in antihypertensive treatment adherence.
Main Methods:
- A multinational cohort study involving over 12 million adults initiating antihypertensive medication.
- ADHD identification through diagnosis or medication dispensation.
- Analysis of antihypertensive medication discontinuation and adherence (Proportion of Days Covered < 80%) using Cox models and logistic regression, with meta-analysis for pooled results.
Main Results:
- Adults with ADHD showed a higher rate of antihypertensive medication discontinuation (HR 1.14) over 5 years, particularly middle-aged and older adults.
- Individuals with ADHD had significantly higher odds of poor adherence (OR 1.45-1.64) up to 5 years.
- ADHD medication use was associated with reduced odds of poor adherence in individuals with ADHD (OR 0.66-0.58).
Conclusions:
- Adults with ADHD face challenges in adhering to antihypertensive treatments, leading to higher discontinuation rates.
- ADHD medication use may positively influence adherence to antihypertensive therapy in this population.
Background:
Adherence to antihypertensive medication, alongside lifestyle modifications, is fundamental to managing hypertension and reducing the risk of cardiovascular disease. Attention-deficit/hyperactivity disorder (ADHD) is a common neurodevelopmental disorder associated with a range of cardiovascular diseases, including hypertension. ADHD medication has also been associated with hypertension. However, the influence of ADHD and ADHD medication on discontinuation and adherence to antihypertensive treatments is unknown.
Methods:
We conducted a multinational cohort study using electronic health databases from seven countries, which included adults who initiated antihypertensive medication between 2010 and 2020. ADHD was identified by a diagnosis of ADHD or dispensation of ADHD medications. The outcomes were (1) time to the first discontinuation of antihypertensive medication and (2) poor adherence, defined as the proportion of days covered (PDC) below 80% during 1-, 2-, and 5-year follow-up periods. We used Cox proportional hazards models and logistic regression to estimate associations, adjusting for age, sex, and calendar year of antihypertensive medication initiation. We pooled results from different countries via random-effects meta-analysis.
Results:
We identified 12,174,321 adults who initiated antihypertensive medication during the study period, including 320,691 (2.6%) with ADHD. In the pooled analysis across all countries, ADHD was associated with an increased rate of discontinuation in 5-year follow-up of antihypertensive medication (hazard ratio [HR] 1.14; 95% CI, 1.02-1.27). In age-stratified analyses, ADHD was associated with a higher rate of antihypertensive medication discontinuation in middle-aged (HR, 1.11; 95% CI, 1.01-1.23) and older adults (HR, 1.14; 95% CI, 1.01-1.29), but not in young adults. Individuals with ADHD also had higher odds of poor adherence across 1 year after treatment initiation (odds ratio [OR] 1.45, 95% CI 1.26-1.67) to 5 years (OR 1.64, 95% CI 1.34-2.00). Among those with ADHD, use of ADHD medications was associated with lower odds of poor adherence (1 year OR 0.66, 95% CI 0.60-0.73; 5 years OR 0.58, 95% CI 0.46-0.72).
Conclusions:
Adults with ADHD are more likely to discontinue antihypertensive treatment and exhibit poor medication adherence. However, ADHD medication use appears to be associated with better adherence among individuals with ADHD.
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