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8227 Social & Preventive Medicine

Due to an effective prevention program, the prevalence of an infectious disease in a community has been reduced by 90%. A physician continues to use the same diagnostic test for the disease that she has always used. How have the test’s characteristics changed ?

AIts sensitivity has increased
BIts positive predictive value has increased
CIts negative predictive value has increased
DThe test's characteristics have not changed
Social & Preventive Medicine
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8233 Social & Preventive Medicine

What is Saturation index?

AUsed to assess the Air quality by measuring concentration of pollutants.
BUsed to assess the water quality by estimating hardness, total dissolved solids, alkalinity and pH.
CUsed to assess the Soil quality that whether it is good for growing crops.
DUsed to assess the Milk quality by estimating the bacterial count in it.
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