|
|
| Evidence
base for oral cancer |
|
| screening |
|
|
|
|
|
|
|
|
|
|
|
|
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| Length bias |
|||||||||||
| n | Tendency of
screening to detect a dispro- |
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| portionate # of
cases of slowly progressive |
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| disease |
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| – | and to miss aggressive cases that, by
virtue of |
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| rapid
progression, are present in the population |
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| only briefly |
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| n | Aggressive
malignancies will be under- |
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| represented in
the cases found |
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| ohcd4_03 |
| 37 |