Community Medicine – Page 6 – howMed

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Spurious Association Sometimes an observed association between a disease and suspected factor may not be real. For example a study …

Quasi experimental designs are based on the same structure as experimental designs but lack the randomization, control, or both. These …

Trial is from the French ‘trier’ (to try). Trial may be: • Clinical trial –in which we apply therapeutic interventions …

An epidemiological experiment in which subjects in a population are randomly allocated into groups, usually called study and control groups …

Cohort is an ancient Roman military unit of 300-600 men, a group of soldiers marching forward in battle. Cohort studies …

The differences between case control and cohort studies may be summarized as follows: Case Control Study Cohort Study • Proceeds …

In case control study, we start with diseased group (“cases”); which we compare with non-diseased group (“controls”). We look back …

In ecological studies, we consider aggregates of individuals. Aggregates often defined by units e.g. geographic region, school or health care …

Cross sectional studies are conducted at a single point in time or over a short period of time. There is …

A case report is a detailed report by a physician of an unusual disease in a single person. The population …