Day 2 Seminar Types of research articles. Original research article new knowledge for the first time.

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Presentation transcript:

Day 2 Seminar Types of research articles

Original research article new knowledge for the first time

Other types of articles in journals: Case report Review article Editorial material: Editorials Commentaries Viewpoints Letter to editor Book or media review

 Observational studies ◦ Cross-sectional / prevalence ◦ Case-control / retrospective ◦ Cohort / prospective  Experimental studies ◦ Controlled clinical trials

Hierarchy of evidence 1.N of 1 randomized control trial 2.Systematic reviews of randomized control trials 3.Single randomized control trial 4.Systematic review of observational (cross-sectional, cohort, or case-control) studies 5.Single observational (cross-sectional, cohort, or case-control) study 6.Physiologic studies (studies of blood pressure, cardiac output, exercise capacity, bone density, etc) 7.Unsystematic clinical observations (case series, case report)

Cross-sectional study Case control study Cohort study sadašnjost prošlostbudućnost Historical cohort study Experimental research Time of study group formation Time of data collection PastPresentFuture

Hierarchy of evidence Centre for Evidence Based Medicine, University of Oxford Levels of evidence for: Therapy / Prevention, Aetiology / Harm Prognosis Diagnosis Differential diagnosis / symptom prevalence study Economic and decision analyses

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