Drug Use Study of Febuxostat After Recent Changes in the Prescribing Information

Study Overview
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Brief Summary
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The prescribing information provides information on medicines. This study will check the number of patients starting febuxostat and the number of febuxostat users with cardiovascular disease after changes to the prescribing information.

Detailed Description
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This is a descriptive, cross-sectional, non-interventional study of participants with gout. The study will evaluate the impact of the 2019 labeling changes (boxed warning and modified indication), based upon results of the cardiovascular safety of febuxostat and allopurinol in participants with gout and cardiovascular morbidities (CARES) trial, on febuxostat utilization. The study will evaluate data from approximately 24046 participants. The data will be collected from optum clinformatics dataMart (CDM) including the medicare advantage administrative US claims database and the IQVIA pharmetrics plus claims database. All participants will be enrolled in a single observational cohort. This trial will be conducted in the United States. The overall duration of this study is approximately 14 months.

Official Title
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Drug Utilization Study to Describe the Pattern of Febuxostat Use in Relationship to Allopurinol Following Addition of the Boxed Warning and Modification of the Indication Based on the Results of the CARES Trial

Conditions
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Gout, Cardiovascular Diseases

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Index fill date on or after 01 June 2016. Having at least one diagnosis for gout (identified with diagnosis codes, International Classification of Diseases, clinical modification, ninth revision [ICD-9-CM]: 274.x or International Classification of Diseases, tenth revision [ICD-10]: M10.x) at any time in the participant's record. Continuously enrolled for at least 12 months prior to index fill date.

Ages Eligible for Study
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Minimum Age: 21 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| All Participants With Gout<br>Participants with gout, initiating febuxostat therapy on or after 01 June 2016 will be included in the study. | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of Participants Newly Initiating Febuxostat Therapy Versus Prevalent New Users | Participants will be categorized into new users and prevalent new users. New users are participants who were naïve to allopurinol, defined as no record of allopurinol use in all historic pharmacy or medical claims at any time prior to initiation of febuxostat. Prevalent new users are participants who had used allopurinol and switched, defined as at least one record of allopurinol use in all historic pharmacy or medical claims at any time prior to initiation of febuxostat. | Up to 14 months | 
| Number of Participants With Established Cardiovascular Disease (CVD) | Participants initiating febuxostat will be categorized as having (Yes/No) to each of the following morbidities at any time prior to initiation of febuxostat: myocardial infarction (MI), unstable angina, stroke (hemorrhagic and ischemic), transient ischemic attack, peripheral vascular disease, diabetes mellitus with evidence of macrovascular or microvascular disease. | Up to 14 months |