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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
Currently selected selection: Definition of a Case
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 of a Case

        

 


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Selection A20%

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The period prevalence of severe breathlessness in the first two days is three patients out of five, or 60%.

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