Exploring Factors Influencing Medication Adherence From Initiation to Discontinuation in Parents and Adolescents With Attention Deficit Hyperactivity Disorder

Phase-specific strategies and interventions to enhance medication adherence across different phases in ADHD: a systematic review and meta-analysis

INTRODUCTION

This systematic review and meta-analysis assessed the characteristics, types, and impact of interventions to improve adherence to attention-deficit hyperactivity disorder (ADHD) medications within the context of the three phases of adherence, namely, initiation, implementation, and discontinuation.

METHODS

PubMed, Psychological Information Database, Embase, International Pharmaceutical Abstracts, and Google Scholar were systematically searched for relevant trials using appropriate search terms. Interventions were classified as educational, behavioural, affective, and multifaceted. Data was pooled using odds ratios and proportions.

RESULTS

Seventeen studies were included in this review. In a pooled analysis of four RCTs, interventions did not significantly improve medication adherence (OR = 2.32; 95%-Confidence Interval=CI = 0.91-5.90; p = 0.08). In seven non-randomized trials, a pooled proportion of people who adhered to ADHD medication was considerably higher in the intervention group (85%, 95%CI = 78%-91%) than in the control group (47%, 95%CI = 33%-61%). Interventions varied in terms of study design, methods and their impact on different phases of adherence.

CONCLUSIONS

Despite some promising results, the lack of consideration of phase-specific adherence factors may limit the effectiveness and sustainability of interventions to improve adherence in clinical practice. Future interventions should be phase-specific, guided by factors which are pertinent to each phase. Meanwhile, clinicians should choose or tailor interventions based on individual needs and preferences.

Longitudinal Patterns of Community-Based Treatment Utilization Among Ethnically and Racially Diverse Adolescents with Attention-Deficit/Hyperactivity Disorder

Background: Attention-deficit/hyperactivity disorder (ADHD) treatment utilization among adolescents is highly variable. This article describes pharmacological and nonpharmacological treatment utilization in a community sample of primarily Latinx and/or Black adolescents with ADHD (N = 218), followed longitudinally for 4 years, from early adolescence until approximately age 17 (M = 16.80, standard deviation = 1.65). Methods: Electronic surveys administered between 2012 and 2019 queried parent and youth reports of medication initiation, persistence, diversion, and misuse, as well as reasons for desistence. Nonpharmacological treatment utilization (including complementary and alternative treatments) was also measured. Results: Results indicated that: (1) the majority of the sample sought treatment for ADHD in their community, (2) rates of psychosocial treatment utilization were higher than medication utilization, (3) approximately half of the medicated sample discontinued community-administered ADHD medication during the follow-up period, most frequently citing tolerability issues and concerns that they were "tired of taking" medication, and (4) medication misuse consisted of youth diversion and parent utilization of teen medication, but both were reported at low rates. Race/ethnicity did not predict treatment utilization patterns, but lower family adversity and psychiatric comorbidity predicted persistence of medication use over time. Conclusions: ADHD treatment engagement efforts for Latinx and/or Black adolescents might link treatment to goals valued by the youth, address concerns related to medication tolerability, and promote secure monitoring of medication. Nonpharmacological treatments for ADHD may be more palatable to Latinx and Black youth with ADHD, and efforts to engage youth with ADHD in treatment should consider offering medication and psychosocial treatment options.

Continuation of Treatment in Children With ADHD: A Multicenter Turkish Sample Study

OBJECTIVES

The aim of this study was to investigate the variables that may affect treatment continuation in children aged 6 to 12 years who were newly diagnosed with ADHD.

METHODS

A total of 132 children diagnosed with ADHD and their parents participated in the study. Sociodemographic and clinical risk factors affecting continuation of treatment were examined using logistic regression analysis.

RESULTS

Multiple model examination revealed that greater age increased the risk of treatment discontinuation 1.824 times (p = .003) while a lower total length of paternal education increased the risk of discontinuation (1/0.835) 1.198 times (p = .022). Other variables emerging as significant in the univariate model lost that significance in the multiple model.

CONCLUSIONS

Understanding the variables associated with medication discontinuation in ADHD in different populations and taking these variables into account in the development of health policies, will be useful in improving the long-term devastating effects of the disorder.

Promoting Medication Adherence in Children with Attention Deficit Hyperactivity Disorder: A Mixed-Methods Systematic Review with Meta-analysis and Qualitative Comparative Analysis

OBJECTIVE

To evaluate the efficacy of ADHD medication adherence interventions and explore the pathways to effectiveness.

METHODS

A systematic review was conducted using multiple databases to identify relevant randomized controlled trials (RCTs). Pooled effect sizes were calculated for medication adherence and ADHD symptom outcomes. Qualitative Comparative Analysis (QCA) was used to identify pathways to effectiveness.

RESULTS

Six RCTs were included. The interventions significantly improved medication adherence (OR = 2.39, 95% CI [1.19, 4.79]) and ADHD symptoms (Hedges' g = -0.96, 95% CI [-1.38, -0.54]). Multi-regression analysis showed a positive relationship between medication adherence and ADHD symptom reduction. QCA revealed two paths for effectiveness: (1) Presence of ADHD drug education and absence of reminder and (2) Presence of tracking and absence of reminder.

CONCLUSION

ADHD medication adherence interventions have a positive impact on both medication adherence and ADHD symptoms. Interventions should consider including ADHD drug education or tracking to maximize effectiveness.

Understanding Barriers and Facilitators of Attention-Deficit/Hyperactivity Disorder Treatment Initiation and Adherence in Black and Latinx Children

OBJECTIVE

Despite evidence that consistent treatment is important for Attention-Deficit/Hyperactivity Disorder (ADHD) management, ADHD treatment initiation and adherence remains suboptimal in minoritized children. The goal of this study was to explore barriers and facilitators to ADHD treatment initiation/adherence for minoritized children to further inform development of our family navigation intervention.

METHODS

Using a virtual platform, we completed 7 focus group sessions (total n.ß=.ß26) and 6 individual interviews with representatives from 4 stakeholder groups: experienced caregivers of children with ADHD, caregivers of children newly diagnosed with ADHD, family navigators, and clinicians who care for children with ADHD. All caregivers identified as Black and/or Latinx. Separate sessions were conducted for each stakeholder group and caregivers had the option to attend an English or Spanish session. Using a thematic analysis strategy, barriers and facilitators to ADHD treatment initiation and/or adherence were coded in focus group/interview data and themes were identified across groups.

RESULTS

The primary barriers to ADHD treatment initiation and/or adherence identified for minoritized children were lack of support from school/healthcare/family members, cultural barriers, limited resources, limited access, and treatmentconcerns, with variability in endorsement across participants. Reported facilitators included caretakers having experience with ADHD, strong support, access to resources, andwitnessing their child...s functional improvement with treatment.

CONCLUSIONS

Caregiver experience with and knowledge about ADHD, support, and access to resources facilitate ADHD treatment in minoritized children. The results from this study have the potential to improve ADHD treatment initiation/adherence and outcomes for minoritized children through the development of culturally tailored, multipronged interventions.

Optimizing adherence to allopurinol for gout: patients' perspectives

AIMS

Poor adherence to allopurinol among people with gout contributes to suboptimal gout management. This study sought to understand the facilitators and barriers to allopurinol adherence across the three stages of medication adherence, and patient perspectives on strategies to improve adherence, including self-monitoring urate concentration.

METHODS

Semi-structured interviews were conducted with 26 people with gout, previously or currently taking allopurinol. De-identified verbatim transcripts were thematically analysed using an inductive and deductive approach.

RESULTS

Facilitators of adherence during allopurinol initiation were motivation to prevent gout flares and trust in the advice of their healthcare professionals (HCPs). Reluctance to commence long-term medication was a barrier to allopurinol initiation. Believing in the effectiveness and necessity of allopurinol and reminder systems were facilitators of implementation. Barriers to implementation included forgetfulness, gout flares and limited feedback on allopurinol's effectiveness. Patients discontinued therapy when allopurinol was perceived as ineffective or unnecessary. Discontinuation coincided with patients experiencing gout flares while adhering to allopurinol and receiving suboptimal advice about gout management. Patients identified receiving accurate advice from HCPs and regular urate monitoring for feedback on allopurinol's effectiveness as potential strategies to improve adherence. Perceived benefits of self-monitoring urate as a strategy to promote adherence included the ability to self-manage gout and make informed decisions about allopurinol therapy with their HCP.

CONCLUSION

Patient perceptions of the effectiveness and necessity of allopurinol influenced intentional adherence during medication initiation, implementation and discontinuation. Strategies that inform patients of their urate control and provide accurate medical advice have the potential to improve adherence to allopurinol.

Predictors of Stimulant Medication Continuity in Children with Attention-Deficit/Hyperactivity Disorder

OBJECTIVE

The objective of this study was to examine the simultaneous impact of patient-related and parent-related factors, medication-related factors, and health care system-related factors on attention-deficit/hyperactivity disorder (ADHD) medication continuity.

METHOD

Stimulant-naïve children (N = 144, M age = 8 yrs, 71% male) with ADHD completed a methylphenidate (MPH) trial and were followed for 1 year after trial completion and return to community care. Multivariable analysis investigated predictors of (1) having at least 1 filled ADHD prescription after return to community care versus none and (2) having more days covered with medicine after return to community care. Predictors included race; age; sex; income; baseline ADHD symptom severity; MPH trial experience; child and parent mental health conditions; and parent beliefs about ADHD, ADHD medications, and therapeutic alliance.

RESULTS

One hundred twenty-one children (84%) had at least 1 filled ADHD medication prescription (mean = 178 d covered by medication) in the year after return to community care. Multivariable models found that a weaker perceived clinician-family working alliance predicted not filling any ADHD prescriptions. Among those who filled ≥1 prescription, factors linked to fewer days of ADHD medication coverage included child sociodemographic factors (non-White race, older age, being female, and lower income), lower parent beliefs that the child's ADHD affects their lives, and higher parent beliefs that medication is harmful, while child oppositional defiant disorder and parental ADHD predicted having more days of medication coverage.

CONCLUSION

Child demographic factors, parent beliefs, and medication-related factors are associated with continuation of ADHD medication. These findings may facilitate the development of effective strategies to improve ADHD medication continuity for children from diverse groups.

Eliciting preferences for continuing medication among adult patients and parents of children with attention-deficit hyperactivity disorder

BACKGROUND

Adherence to medication for attention-deficit hyperactivity disorder (ADHD) is less than optimal. Previous studies have primarily focused on qualitative assessment of factors that influence medication adherence.

OBJECTIVE

This study aimed to quantify the factors that influence patient and parent preferences for continuing ADHD medication.

METHOD

A discrete-choice experiment was conducted to investigate preferences. Adults, and parents of children, with ADHD were presented with eight hypothetical choice tasks of three options (Medication A, Medication B, No Medication) described by six attributes related to medication outcomes. Preferences were estimated using a mixed multinomial logit model.

RESULTS

Overall, respondents' preferences (n = 216) for continuing medication were negative (mean [β] = -1.426, p < .001); however, a significant heterogeneity in preferences was observed amongst respondents (standard deviation = 0.805, p < .001). Improvements in education, aggressive behaviour, social behaviour and family functioning, and side effects and stigma, influenced respondents' decision to continue taking medication. The respondents were willing to continue medication if they experienced positive effects, but side effects (even moderate) were the strongest concern for not continuing medication. While side effects were the most important factor for both adult patients and parents of children with ADHD, improvement in education was relatively more important for adults and improvement in aggressive behaviour, social behaviour and family functioning was relatively more important for parents of children with ADHD. Parents were more likely to not continue a medication with severe side effects even at the highest level of improvement in education.

CONCLUSIONS

Side effects are the most important factor that influenced preferences for continuing medication for both adults with ADHD, as well as parents of children with ADHD. While overall the respondents preferred not to take/give medication, discrete-choice experiment showed that the relative importance of factors that influenced continuation of medications was different for the two groups.

PATIENT AND PUBLIC INVOLVEMENT

Adults, and parents of children, with ADHD participated in this study by completing the online questionnaire. The questionnaire was based on findings of research in the literature, as well as earlier focus groups conducted with adults, and parents of children, with ADHD. The face validity of the questionnaire was determined by asking parents of children, and adults, with ADHD (n = 3) to complete the survey and participate in a short discussion on their understanding of the questions and their recommendations on improving the clarity of the survey.

Using discrete choice experiment to investigate patients' and parents' preferences for initiating ADHD medication

BACKGROUND

The decision to initiate medication is complex and is influenced by a variety of factors. There is limited information on the relative importance of factors that influence the initiation of ADHD medication.

AIMS

To investigate the factors, and their relative importance, that influence the decision to initiate medication in adults, and parents of children, with ADHD.

METHODS

A discrete choice experiment was conducted using eight choice tasks made up of five attributes that described the outcomes of initiating medication. A mixed multinomial logit model was used to estimate preferences for medication.

RESULTS

Respondents' overall preferences for initiating medication were negative (Mean (β)= -0.72705, p < 0.1), however, significant heterogeneity was noted in preferences (SD: 0.93604, p < 0.001). Side-effects were the most important factor for both adults (Relative importance (RI) = 40.39%) and parents (RI = 41.99%). Improvement in education had a greater weighting in adults' decision-making compared to parents (RI = 36.93% vs 30.47%) while improvement in aggressive (RI = 14.38% vs 11.84%) and social behaviour (RI = 12.59% vs 10.37%) was more important to parents.

CONCLUSIONS

Important differences in preferences of patients and parents were identified, highlighting that the decision to initiate medication is influenced differently in different individuals and groups.