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Type 2 diabetes (T2D) is a chronic, progressive metabolic disease in which the body becomes resistant to insulin, most often as a result of obesity and a sedentary lifestyle. The primary goal of the treatment of T2D is to achieve and maintain glycemic control in order to reduce the risk of both microvascular complications (, diabetic neuropathy, retinopathy, nephropathy) and macrovascular complications (, myocardial infarction, stroke). Due to the progressive nature of T2D, the number of antidiabetic medications used increases over time. Physicians and treatment guidelines acknowledge the role of metformin as the gold-standard first-line therapy in treating T2D. Further therapies (primarily oral agents such as dipeptidyl peptidase-4 [DPP-IV] inhibitors, sodium-glucose cotransporter 2 [SGLT-2] inhibitors, and sulfonylureas) are typically added as second- and third-line agents to help maintain long-term glycemic control. A significant number of patients will also require additional treatment with injectable therapies such as the glucagon-like peptide-1 (GLP-1) receptor agonists and insulins. Using patient-level claims data, this report analyzes the use of key therapies in the newly diagnosed and recently treated T2D patient populations. With respect to newly diagnosed patients, the report provides a prospective 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. For recently treated patients, the report quantifies a drug’s source of business versus its competitors and details which drugs precede others through a retrospective analysis of patient claims data. Additional analyses explore persistency and compliance by brand.
Primary patient-level data: Quantitative findings from our analysis of data cover 40 million lives, providing the most representative sample of U.S. treatment practice for Medicare and commercially insured patients. This report is delivered as a key findings slide deck and a dashboard that can be accessed using the Internet with claims that are between 6-12 months old at the time of publication.
Patient Sample: To qualify for inclusion, patients had to be older than age 18 and meet one of the following conditions:
- At least one prescription from the drug list and at least one claim with a diagnosis code for T2D (International Classification of Diseases, Ninth Revision [ICD-9] diagnostic codes 250.00, 250.02, 250.10, 250.12, 250.20, 250.22, 250.30, 250.32, 250.40, 250.42, 250.50, 250.52, 250.60, 250.62, 250.70, 250.72, 250.80, 250.82, 250.90, 250.92) during the study period.
- At least two claims with a diagnosis code for T2D (see above) in the two-year period (the two claims must be 30 days apart).
- At least one claim with a diagnosis code for T2D (see above) and at least two laboratory codes for a HbA1c test (CPT 83036) in the second year of this period only.
- At least one prescription for an oral antidiabetic agent (OAA) and one prescription for either insulin or Symlin [AstraZeneca’s pramlintide) irrespective of ICD-9 diagnosis codes.
- At least one claim with any of the above diagnosis codes for T2D in the two-year period and at least two claims for a fasting glucose test (CPT 82947).
- At least one claim with any of the above diagnosis codes for T2D in the two-year period and at least two claims for a diabetes screening test (G8777).
Of these patients, those aged 18-40 who had at least one prescription for insulin or Symlin without an accompanying prescription for an OAA were excluded because these patients were considered likely to have type 1 diabetes (T1D). Although T1D patients older than age 40 could be captured in our analysis, we strongly believe that the vast majority of sampled patients are accurately diagnosed with T2D.
Quantified lines of therapy analysis shows the exact share of each agent in each line of therapy, including the rate of progression between lines and the 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 key concomitant 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.
- Quarterly trending of patient share for all key therapies.
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