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Epidemiological Methods in Studies of Symptoms in Advanced Disease
Author Bios
Why Study Advanced Disease?
Why Epidemiology?
Incidence and Prevalence
Using Incidence and Prevalence
Definition of a Case
Currently selected selection: Defining Time, Place, Person
Types of Study Design
Cross-Sectional Studies
Longitudinal Studies
Measurement
Bias
Selection Bias
Measurement Bias
Presenting and Interpreting Results
Practical Example
Calculating Prevalence
Conclusion


Chapter 19: Epidemiological Methods in Studies of Symptoms in Advanced Disease: Defining Time, Place, Person
        


When describing or comparing symptom prevalence and incidence, the results can be affected by such factors as:

  • Time (for example time of day, time period included);
  • Place (for example, home, hospital, open plan hospital ward or in a private room, out-patient clinic); and
  • Person (this includes both the sociodemographic and clinical circumstances of the patient, for example, age, stage of disease, and the person who collects the data).


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