HLTC27H3 Lecture Notes - Lecture 1: Confounding, Treatment And Control Groups, Reference Group
18 Mar 2021
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Definition of health and disease: health, definition of disease usually based on combination of physical and pathological examinations, diagnostic test results, and signs and symptoms. Which and how many criteria are used to define a case (a person who meets the disease definition) Division of two related numbers; numerator is a subset of denominator. Division of two numbers; time is always in denominator. Proportion: expressed as percentages and range from 0 to 1 or 0% to 100% Incidence deals with the transition from health to disease: prevalence: measures existence of current disease, prevalence focuses on the period of time that a person lives with a disease. Each measures describes an important part of the natural source of a disease. Incidence: new cases of disease developing in a candidate population over a specified time period. Incidence rate: defined as occurrence of new cases of diseases that arise during person time.
