Evaluating the Impact of a Value-based Prescription Drug Formulary

Inclusion Criteria

• •Individuals:
• •* aged 0-64
• •* Continuously enrolled in an employer-sponsored health plan for at least 12 months (with one-month allowable gap) prior to the index date
• •* For individuals in the exposed group, the index date is defined as the start date of value-based formulary implementation at the employer group level
• •* For individuals in the control group, the index date is defined as the index date of the matched exposed individual
• •Employer groups:
• •* that transition to the value-based formulary if they transitioned all enrollees in that employer group (no individual selection)