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Social & Preventive Medicine
A study is planned to check stool occult blood positivity using hemoccult test among a group of paicipants aged 50 - 75 years. The test is repeated if result is positive. No repeating if the test is negative. What is the effect on sensitivity and specificity?
Sensitivity increases specificity decreases
Sensitivity decreases specificity increases
Sensitivity unchanged specificity increases
Sensitivity increases specificity unchanged
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