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Cancer Screening - Coggle Diagram
Cancer Screening
Screening
Testing of apparently healthy, asymptomatic individuals for the purpose of separating them into groups with higher and lower probabilities of having a given cancer
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Candidate for Screening
- Serious health problem
Cause of subsantial mortality and morbidity
- Detectable pre-clinical phase (DPCP)
- DPCP is long and prevalent in target population
- Target population willing to accept screening
- Resources available for proper evaluation of positive screen
- Rescources available for treatment
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Evaluation
Reliability
Influences
- Variability in the factor being measured
- Variability of method, skill measurement and interpretation of value
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Measures of Validity
- Sensitivity → True positives
- Specificiy → True negatives
- Positive predictive value (PPV)
- Negative predictive value (NPV)
Capacity of a test to give the same result on repeated applications in the same person with a given level of disease, whether correct or incorrect
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