OR
Type of Question |
Type of Study |
Therapy/Prevention |
Randomized Controlled Trial (RCT), cohort study, or meta-analysis, systematic review |
Diagnosis |
Prospective, blind comparison to the gold standard (usually a clinical trial or a cross-sectional study) |
Prognosis |
Cohort study, case control study, case series |
Etiology/Harm |
RCT, cohort study, case-control study, case series |