(SOLVED) A new screening test is developed to identify early stage Breast Cancer.
A new screening test is developed to identify early stage Breast Cancer. The developers claim higher quality standards compared to the traditional mammogram. The results of their initial quality testing are below Breast Cancer Yes No Positive Test 322 43 Negative Test 80 170 Totals 402 213 Question 13 What is the interpretation of the NPV for this test? Edit View Insert Format Tools Table 12ptParagraph v B в I o Avey т?у &A DVD 四 1 1
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NPV is negative predictive value.
NPV = [True negative ÷ ( true negative + false negative )] × 100.
True negative = 170
False negative = 80
True positives = 322
False positives = 43.
Therefore, NPV = [170 ÷( 170 + 80 ) ] × 100
= [ 170 ÷ 250 ] ×100
= 68 %
Interpretation : Higher the NPV higher is the sensitivity of the test.In this case , among those who gave had a negative screening test , the probability of being disease free is 68 %.