Perspective on CYP2C19 genotyping test among patients with acute coronary syndrome - a qualitative study.

Aim: Identify factors patients consider regarding CYP2C19 genotyping test to guide choice of antiplatelet therapy. Patients & methods: Patient's perception and attitude toward use of CYP2C19 genotyping test was gathered according to an interview guide. Thematic analysis was conducted. Results: A total of 14 patients were interviewed. The main factors found to influence uptake of CYP2C19 genotyping test are, convenience of genotyping test (n = 4), physician's recommendation (n = 11), prior explanation of genetic testing by medical personnel (n = 5) and inclination toward clopidogrel, with three sub-factors; less frequent dosing (n = 3), lower cost (n = 7) and lower risk of bleeding (n = 9). Conclusion: This study provided the information needed to develop a discrete choice experiment to empirically quantify patients' preference and willingness to pay for genetic testing and to simulate uptake.