Patterns of Prescription Medication Use Before Diagnosis of Early Age-Onset Colorectal Cancer: Population-Based Descriptive Study

Vienna Cheng   ^{1, 2} , PharmD ;   Eric C Sayre   ³ , PhD ;   Vicki Cheng   ^{1, 2} , PharmD, MSc ;   Ria Garg   ⁴ , PharmD ;   Sharlene Gill   ^{5, 6} , MPH, MBA, MD ;   Ameer Farooq   ⁷ , MPH, MD ;   Mary A De Vera   ^{1, 2, 8} , BSc, MSc, PhD

¹ Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, BC, Canada

² Collaboration for Outcomes Research and Evaluation, Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, BC, Canada

³ British Columbia Centre on Substance Use, Vancouver, BC, Canada

⁴ Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, ON, Canada

⁵ Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada

⁶ BC Cancer, Vancouver, BC, Canada

⁷ School of Medicine Division of General Surgery, Queen’s University, Kingston, ON, Canada

⁸ Centre for Health Evaluation and Outcome Sciences, University of British Columbia, Vancouver, BC, Canada