USPSTF heirarchy of research disease
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Classification
- level I: randomized clinical trial
- level II-1: clinical trial without randomization
- level II-2: cohort study or case-control study
- level II-3: mutliple case series
- level III: expert opinion
References
- ↑ Medical Knowledge Self Assessment Program (MKSAP) 17, American College of Physicians, Philadelphia 2015