Denominator in sensitivity is ?
Total number of healthy people
Total number of diseased people
Total number of people showing positive results
Total number of people showing negative results
Ans. is 'b' i.e., Total number of diseased people i) SensitivityIt is the percentage of diseased people that who are diagnosed as having disease.Total number of diseased people = True positive + False negative.Number of people (among diseased people) diagnosed as having disease = True positives. ii) SpecificityIt is the percentage of healthy people who are identified as healthy.Total number of healthy people = True negatives + False positivesNumber of healthy people who are identified as healthy = True negatives