3. Purpose of Screening
⢠To detect early disease or risk factor
for disease in large number of
apparently healthy individuals.
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4. ⢠Active search for disease among apparently
healthy people is a fundamental aspect of
prevention.
⢠This is done in screening , which has been
defined as â search for unrecognised disease or
defect by means of rapidly applied tests ,
examinations or other procedures in apparently
healthy individualsâ.
CONCEPT OF SCREENING
6. ⢠Screening differs from periodic health
examination in the following aspects :
ď˘ Capable of wide application
ď˘ Relatively inexpensive
ď˘ Requires less physician - time
7. ⢠Basic purpose of screening is to sort
out , large group of apparently healthy
persons those likely to have the
disease or at increased risk of disease
under study.
⢠They also bring âapparently abnormalâ
individuals under medical supervision
and treatment.
AIMS AND OBJECTIVES
8. ⢠To detect outbreak or disease or
production losses and causes.
⢠To identify the undiagnosed cases of
disease.
⢠To monitor health trends in a target
population.
OTHER PURPOSES
9. ⢠To monitor exposed individuals for
symptoms.
⢠To monitor treated individuals for
complications.
⢠To generate hypothesis for further
evaluation.
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10. ⢠Early diagnosis and subsequent
treatment favourably alters the
natural history of the disease in a
significant proportion of those who
are identified as positive.
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11.
12. ⢠Diagnosis of disease at
individual level .
⢠Positive results in screening
needs more confirmatory tests
/ diagnostic tests .
IT DOES NOT INTEND FOR.....