premonition
Forum Elite
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A screening test X for a common disease D has a positive and negative predicitve value of P and N respetively when the prevalence is 10%.
Next ,over time due to unforseeable circumstances prevalence miraculously dips down.Surely,the angels have been shining down.The tests sensitivity and specificity remain unchanged.
What happens to P and N ? :!:
1.)P decreases N increases
2.)Both P and N decrease
3.)P increases and N decreases
4.)Both Increase
5.)No change
6.)Cannot happen in real life, a technical impossibility
:?: :idea:
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| dimps
Forum Guru
Topics: 63
Posts: 446
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i think 1...P decreases N increases
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hi how r u
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| Anil Kumar980
Forum Senior
Topics: 15
Posts: 130
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Yes it is 1
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| premonition
Forum Elite
Topics: 48
Posts: 192
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Yes 1 is correct.
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Of all the things I have lost,I miss my mind the most.
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