Abstract
Objective: To assess the humanistic and economic burden of attention-deficit/hyperactivity disorder (ADHD) among adult patients treated with immediate-release (IR) only or extended-release (ER) only stimulants and those unmedicated versus treated with ER + IR stimulants. Methods: This study analyzed linked data from National Health and Wellness Survey and claims to assess the differences in patient characteristics and outcomes, including health-related quality of life (HRQoL), work productivity and activity impairment, and health care resource utilization (HRU) and associated costs by comparing ADHD patients treated with either IR or ER and those unmedicated for ADHD versus ER + IR. Results: The burden of ADHD was compared among adults on stimulant medications with different duration of effect (DoE) (ER + IR: n = 34, ER: n = 184, IR: n = 149) and the unmedicated group (n = 114). Bivariate analysis showed the IR (P = .047) and unmedicated groups (P = .01) had significantly lower Medical Outcomes Study 36-item Short Form physical component summary scores versus ER + IR. The unmedicated group had higher HRU and associated costs versus other groups. Multivariable analysis revealed that the unmedicated group had twice as many outpatient visits (P = .001) and higher total annual direct costs than those on ER + IR (risk ratio = 2.20, P = .016). Patients with mental health comorbidities had significantly poorer HRQoL mental component summary scores and higher activity impairment versus those without mental health comorbidities (P = .001 and P < .001, respectively). Conclusions: Patients with ADHD treated with longer DoE formulations had substantially better economic outcomes versus shorter DoE formulation or unmedicated groups, offering potential cost savings to the health care system and the patient. Furthermore, it is important to consider the effect of mental health comorbidities in the overall management of ADHD.
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