Question

Diabetes mellitus is a group of metabolic diseases characterized by hyperglycemia resulting from defects in insulin secretion, insulin action, or both. The prevalence of Type 2 diabetes mellitus is increasing—more than 9% of the adult U.S. population currently has this disorder. Diabetes is a leading cause of blindness, renal disease, and amputation and leads to increased mortality, primarily from cardiovascular events. The fasting plasma glucose (FPG) test is a blood test that determines the amount of glucose (sugar) in the blood after an overnight fast or after not eating for at least 8 hours. An FPG of ≥126 indicates that a person has Type 2 diabetes. Supposed the following test results were obtained for a screening test for diabetes with a cutoff ≥126 mg/dl. Label the table with TP, FP, FN, and TN.

	DIABETIC	NOT DIABETIC	TOTAL
Positive test result	27	25	52
Negative test result	14	34	48
Total	41	59	100

1. What is the sensitivity of this test? What does it mean in words? SHOW YOUR WORK

2. What is the sensitivity of this test? What does it mean in words? SHOW YOUR WORK

3. What is the positive predictive value of this test? What does it mean in words? SHOW YOUR WORK

4. What is the negative predictive value of this test? What does it mean in words? SHOW YOUR WORK

Answer 1

	Diab	non dia	total
Positive	TP 27	FP 25	52
Negative	FN 14	TN 34	48

Sensitivity TP/TP+FN

27/27+14=0.66

it means 66% chance is dere that test has correctly identified a person with diabetes

Positive predictive value TP/TP+FP *100=51.9% means 52%chance is there that person diagnosed with diabetes has actual diabetes.

neg predictive value TN/TN+FN*100. = 29.2% means 29% chance is there that person negative fir the diabetes with this test is non disbetic actualy.