Patients with hypertension (P) who rely on a plant-based diet (I) compared to the standard omnivorous diet

“DO Patients with hypertension (P) who rely on a plant-based diet (I) compared to the standard omnivorous diet (C) have a decrease the incidence of CVA and MI (O) within 12- 24 months (T)?”
Describe how you would find a sample that would represent your population of interest.