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Flashcards in 19 Evaluation of Screening Programs Deck (9)
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1

What is the #1 harm of screening?

False positives

2

3 harms of screening

Screening tests are not perfect (false positives and false negatives)
Overdiagnosis
Overtreatment

3

Overdiagnosis

Finding cancers that would never have presented clinically
Would have died of something else before it would have been a problem

4

Overtreatment

Treating cancers that would not have lead to premature death

5

Benefit to screening

Delayed death (decreased mortality rate)

6

3 cancers we screen for in Canada

Breast
Colorectal
Cervical

7

"Shift to the left"

Shift the frequency distribution of cancers from stages 2 and 3 to more of 1 and 2

8

2 ways to evaluate screenin

RCTs
Cohort studies

9

What are some things we use to decide if a screening program is worthwhile?

Disease must be important
Early treatment must be better than late treatment
Prevalence of preclinical disease is high enough to justify the cost of screening
Simple to administer
Acceptable (those being screened are going to cooperate)
Valid (provides a true measure of the attribute)
Yields reproducible results
Cost effective