A Study on the Use of Healthcare Resources and Costs of Attention Deficit Hyperactivity Disorder (ADHD) in Adults in England

Healthcare Resources Utilization and Associated Costs of Adult ADHD in England

The main aim of the study is to learn about the demographic and clinical characteristics, healthcare resources utilization (HCRU) and costs associated with before and after ADHD diagnosis in England. No study medicines will be provided to participants in this study. The record available in Clinical Practice Research Datalink (CPRD) database and Hospital Episode Statistics (HES) database for ADHD participants will be assessed.

Inclusion Criteria

1. Age greater than or equal to (>=) 18 years at the beginning of the patient observation period (that is 18-months prior to the adult ADHD diagnosis to ensure they would have been seen in adult health care services).
2. First record of an adult ADHD diagnosis between 01st January 2016 and 30th June 2018.
3. Data availability in the database at least during the 18-months before and after the index date.

Exclusion Criteria

A participant will be excluded from the study if their CPRD linked to HES electronic medical record data includes:

1. Incomplete information for key demographics (that is, missing age or sex).
2. Clinical history of a diagnosis of ADHD during childhood or adolescence.
3. Prescription of a licensed adult ADHD medication (that is, methylphenidate, lisdexamfetamine, dexamfetamine, atomoxetine) during the pre-index period.