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  2. Hierarchy of evidence - Wikipedia

    en.wikipedia.org/wiki/Hierarchy_of_evidence

    Level II-1: Evidence obtained from well-designed controlled trials without randomization. Level II-2: Evidence obtained from well-designed cohort or case-control analytic studies, preferably from more than one center or research group. Level II-3: Evidence obtained from multiple time series designs with or without the intervention. Dramatic ...

  3. Evidence-based medicine - Wikipedia

    en.wikipedia.org/wiki/Evidence-based_medicine

    Level II-1: Evidence obtained from well-designed controlled trials without randomization. Level II-2: Evidence obtained from well-designed cohort studies or case-control studies, preferably from more than one center or research group. Level II-3: Evidence obtained from multiple time series designs with or without the intervention. Dramatic ...

  4. Umbrella review - Wikipedia

    en.wikipedia.org/wiki/Umbrella_review

    Umbrella reviews are among the highest levels of evidence currently available in medicine. [2] By summarizing information from multiple overview articles, umbrella reviews make it easier to review the evidence and allow for comparison of results between each of the individual reviews. [1]

  5. Donald Kirkpatrick - Wikipedia

    en.wikipedia.org/wiki/Donald_Kirkpatrick

    In practice, then, it is common for trainers to get stuck in Levels 1 and 2 and never proceed to Levels 3 and 4, where the most useful data exist. Today, Kirkpatrick-certified facilitators stress "starting with the end in mind," essentially beginning with Level 4 and moving backward in order to better establish the desired outcome before ever ...

  6. Bradford Hill criteria - Wikipedia

    en.wikipedia.org/wiki/Bradford_Hill_criteria

    Researchers have applied Hill’s criteria for causality in examining the evidence in several areas of epidemiology, including connections between exposures to molds and infant pulmonary hemorrhage, [14] ultraviolet B radiation, vitamin D and cancer, [15] [16] vitamin D and pregnancy and neonatal outcomes, [17] alcohol and cardiovascular ...

  7. GRADE approach - Wikipedia

    en.wikipedia.org/wiki/GRADE_approach

    The software is free for non-profit organizations and is available online. [8] The GRADE approach to assess the certainty in evidence is widely applicable, including to questions about diagnosis, [9] [10] prognosis, [11] [12] network meta-analysis [13] and public health. [14]

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