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Question 693
Statistics → Epidemiology
Classification
Question
SSBAQuestion Header
Statistics
Question Stem
Repeated application of the same measurement under comparable conditions gives very similar results. Which property is principally demonstrated?
Options
A
Sensitivity
B
Specificity
C
Reliability
D
Positive predictive value
E
Incidence
Explanation
Reliability describes the consistency or reproducibility of a measurement or test when it is repeated under comparable conditions. A test may produce reproducible results without those results necessarily establishing other properties such as sensitivity, specificity or predictive value.
Option Validity
A) Sensitivity measures correct positive identification among those with disease.
B) Specificity measures correct negative identification among those without disease.
D) Positive predictive value concerns the probability of disease when a test is positive.
E) Incidence measures newly diagnosed cases over a specified period.
Further Reading
Saxena - MRCOG-1 Basic Sciences, Chapter 10: Epidemiology/Statistics, Printed p.288.