As an occupational health epidemiologist, you are required to measure the effect

Question

As an occupational health epidemiologist, you are required to measure the effect of stress on workers in your manufacturing plant. two different tests previously developed to measure stress in industrial workers are selected: stress test alpha and stress test delta. the sensitivity and specificity of each test are shown here. stress test alpha: sensitivity = 60%, specificity = 95%. stress test delta: sensitivity = 55%, specificity = 90%. which test generates the greatest proportion of False Positives? As an occupational health epidemiologist, you are required to measure the effect of stress on workers in your manufacturing plant. two different tests previously developed to measure stress in industrial workers are selected: stress test alpha and stress test delta. the sensitivity and specificity of each test are shown here. stress test alpha: sensitivity = 60%, specificity = 95%. stress test delta: sensitivity = 55%, specificity = 90%. which test generates the greatest proportion of False Positives?

Explanation / Answer

Sensitivity, or true positive rate = TP/P = TP / (TP + FN); TP: True Positive, FN:False Negative

Specificity, or true negative rate = TN/N = TN / (TN + FP)

From the data given, a lower specificity implies a greater proportion of False positives. Hence Stress Test Delta generates a greater proportion of false positives.

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