ANTC67H3 Chapter 2: Chapter 2 Notes
Document Summary
The most ambitious definition of health is that proposed by who in 1948: zz . This definition j criticized because of the difficulty in defining and measuring well-being. A specific cut-off point for an abnormal value is based on an operational definition and not on any absolute threshold. Diagnostic criteria are usually based on symptoms, signs, history, and test results. Diagnostic criteria may change quite rapidly as knowledge increases or diagnostic techniques improve; they also often change according to the context in which they are being used. Several measures of disease frequency are based on the concepts of prevalence and incidence. An important factor in calculating measures of disease frequency is the correct estimate of the numbers of people under study. The people who are susceptible to a given disease are called the population at risk, and can be defined by demographic, geographic, or.
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