It depends on the case; there is no single guideline.
Case-control study in 52 countries (≈30,000 people, INTERHEART): nine modifiable factors (smoking, abnormal lipids, hypertension, diabetes, abdominal obesity, psychosocial factors, low fruit/vegetable intake, sedentary lifestyle, and alcohol) explain most of the heart attack risk worldwide. Case-control design (association).
View the study (study) →Lifestyle · Highest evidence: High · 1 finding
Information, not medical advice. Prescription drugs require a doctor.
Information, not medical advice. Scientific evidence reflects the quality of the studies.