Epidemiological Methods - Mid Term Questions with Correct Answers 2025/2026

1.How is validity measured?: sensitivity and specificity
2.Validity: The ability of a test to measure what it is intended to measure
3.reliability: the extent to which a test yields consistent results, as assessed
by the consistency of scores on two halves of the test, on alternate forms of
the test, or on retesting
4.Specificity: The ability of the test to identify correctly those who do not
have the disease.
5.sensitivity: The ability of a test to identify correctly those who have the
disease.
6.measures of morbidity: incidence and prevalence
7.measures of frequency: incidence, prevalence and mortality
8.What do measures of frequency do?: used to characterize the occurrence of
health events in a population
9.Prevelance: The number or proportion of cases of a particular disease or
condi- tion present in a population at a given time.
10.incidence: The number or rate of new cases of a particular condition
during a specific time.
11.epidemic: the occurrence of more cases of disease injury or other health
conditions than expected in a given area, or among a specific group of