Terms in this set (...) States the facts about a condition can look to compare previous studies and state how they relate has no null hypothesis can lead to a null hypothesis Case series and case reports are types of descriptive epi studies. Further epidemiological studies are needed to confirm these specific mortality risks among soccer players. Third edition. It should first be emphasized that all epidemiological studies are (or should be) based on a particular population (the ‘source population’) followed over a particular period of time (the ‘risk period’). Such knowledge help health policy makers to effectively plan interventional measures and other preventive, treatment and educational programs that will help to reduce the scourge of the prevailing disease within the community. The history of exposure to the suspected risk factor is ascertained in all the members of both the groups Types of Epidemiological Studies. Randomized controlled trials (RCT) – uses patients as units of study, mostly for assessing a new therapy vaccinated and non vaccinated can not usually be decided by randomization Principles of Epidemiology and Epidemiologic Methods. Case Control Study. V. Factors which are significantly more in the cases group as compared to the control are reaffirmed as the risk factors The most commonly used analytical study designs are listed here and are covered in this module. the why) in a population/community. 2. Third edition. Case-Control Study “A case-control study is designed to help determine if an exposure is associated with an outcome (i.e., disease or condition of interest). Data from a case series epidemiological study are used to analytically investigate the underlying characteristics of a disease in any population/community of people. Experimental Epidemiological Studies. Your email address will not be published. it studies the relationship between a disease and its determinants). Based on these facts, epidemiological studies can be broadly divided into two categories which are Observational Epidemiological Study and Experimental Epidemiological Study. Case reports follow one individual and report on the epidemiology of their condition. Cohort study: using ‘exposed’ and ‘un –exposed’ cohorts Evidence-Based Medicine. Epidemiology Definition: By John M. Last in 1988 as, “ The study of the distribution and determinants of health –related states or events in specified populations, and the application of this study to the control of health problems.” 3. 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