Laboratory Management

Question 1

How do you calculate sensitivity?

Answer 1

True positive/(true positive + false negative)

It’s TRULY POSITIVE to be sensitive.

Both sensitivity and specificity are opposites (Either TP/FN or vise versa)

Question 2

How do you calculate specificity?

Answer 2

True Negative/(true negative + false positive)

It’s TRULY NEGATIVE to be specific.

Both sensitivity and specificity have opposites (Either TP with FN or vise versa)

Question 3

How do you calculate positive predictive value?

Answer 3

True positive/True positive + false positive

Positive predictive value is ALL POSITIVE
True positive and false positive

Question 4

How do you calculate negative predictive value?

Answer 4

True negative/True negative + false negative

Negative predictive value is ALL NEGATIVE
True negative and false negative