Alzheimer’s disease (AD) affects more than two million people in the United States, with prevalence estimated to increase over the next five years, imparting a substantial burden on patients, caregivers, and the healthcare system. Treatment for cognitive symptoms is limited to two drug classes (acetylcholinesterase inhibitors [AChEIs] and NDMA receptor antagonists) that deliver modest efficacy and do not impact the underlying course of the disease, and for behavioral symptoms physicians must rely on off-label drugs (antidepressants, antipsychotics) that can pose tolerability challenges and/or significant risk for elderly patients.

Using national patient-level claims data, this report analyzes physician adherence to the treatment guidelines by exploring the use of key therapies in the newly diagnosed and recently treated AD patient populations. Considering newly diagnosed patients, the report provides a quantitative analysis of treatment patterns and share by line of therapy, as well as progression between lines, duration of treatment on each line, and use of concomitant treatment. With respect to recently treated patients, the report quantifies a drug’s source of business compared with its competitors and details which drugs precede others through an analysis of add-versus-switch patterns. Additional analyses explore persistency and compliance by brand.

Questions Answered in This Report:

  • Newly diagnosed patients: Nearly half of AD patients begin treatment with a key therapy within a year of their initial diagnosis. What percentage of these patients progress to a second- or third-line drug within the first year? Which products capture the most patient share in the first, second, and third lines of treatment? How often is combination therapy used in each line of therapy?

  • Recently treated patients: AChEIs remain the most commonly prescribed treatment for AD among recently treated patients. Which specific drugs garner the most patient share for recently treated AD patients? When do patients progress from one therapy to the next in AD, and how does this pattern differ among key drugs? Are most recently treated patients with each key brand coming from new (adds/switches) or continuing business?

  • Pathways to key therapies: Longitudinal claims data reveal relatively consistent use patterns of key therapies among recently treated AD patients over time. Which therapies have experienced market growth or decline over the key therapy periods studied? To what extent are key therapies prescribed concomitantly to recently treated patients, and with what other drugs are they prescribed to patients as adjuncts?

Scope:

Primary patient-level data: This report provides quantitative findings from our analysis of data covering approximately 40 million lives and provides the most representative sample of U.S. treatment practice for commercially insured and Medicare patients. This report is delivered as a key findings slide deck and a dashboard that can be accessed using the Internet and presents claims that are between 6-12 months old at time of publication.

Patient Sample: Patients who are continuously enrolled for the complete two-year study period must meet the following condition: at least one claim with a diagnosis code for AD (International Classification of Diseases, Ninth Revision [ICD-9] diagnostic codes 331.0) during the study period.

Quantified lines of therapy analyses show exact share of each agent in each line of therapy, including rate of progression between lines and length of time patients are on each line.

Newly diagnosed patients:

- Patient share by drug class and key products across three lines of therapy, within one year of diagnosis.

- Patient flowcharts through one year of treatment for all first-line products, including progression rates and add/switch behavior.

- Polypharmacy and concomitant prescriptions among key acute therapies by line of therapy.

- Quarterly trending of patient share by line of therapy.

Recently treated patients:

- Quarterly snapshot of patient share by drug class and key products.

- Pathway to key therapy flowcharts tracking the preceding therapy patterns for all key therapies, including add/switch behavior.

- Brand source of business including share for continuing, new (switches/adds), and new (initial therapy) business.

- Polypharmacy and key concomitant therapies.

- Drug persistence and compliance.

- Quarterly trends in patient share for all key therapies.

Author(s): Tamara Blutstein, Ph.D.

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