#1
Which of the following measures represents the number of new cases of a disease within a specific population over a given period of time?
Incidence
ExplanationIncidence measures new cases of a disease over time.
#2
In epidemiology, what does the 'attack rate' measure?
The proportion of cases among the total population at risk
ExplanationAttack rate measures the proportion of cases among those at risk.
#3
Which of the following is NOT a type of epidemiological study design?
Experimental study
ExplanationExperimental study is not an epidemiological study design.
#4
What does the term 'morbidity' refer to in epidemiology?
The number of individuals with a particular disease or condition
ExplanationMorbidity refers to the prevalence of disease in a population.
#5
Which of the following best defines 'epidemiology'?
The study of the distribution and determinants of health-related states or events in specified populations
ExplanationEpidemiology studies health-related states and events in populations.
#6
In epidemiology, what does 'population at risk' refer to?
The population exposed to the possibility of developing a particular disease
ExplanationPopulation at risk refers to those exposed to disease possibility.
#7
Which of the following is NOT considered a measure of disease frequency?
Morbidity rate
ExplanationMorbidity rate is not a measure of disease frequency.
#8
What is the formula to calculate prevalence?
Number of existing cases / Total population
ExplanationPrevalence is calculated by dividing existing cases by total population.
#9
What does the term 'cohort' refer to in epidemiology?
A group of individuals followed over time
ExplanationCohort refers to a group followed over time for a study.
#10
Which of the following is a measure of association used in epidemiological studies?
Relative risk
ExplanationRelative risk measures association between exposures and outcomes.
#11
What does 'sensitivity' measure in diagnostic testing?
The proportion of true positives among all positives
ExplanationSensitivity measures true positives among all positive cases.
#12
What is the purpose of standardization in epidemiology?
To adjust for differences in age distribution between populations
ExplanationStandardization adjusts for population differences in age.
#13
Which of the following measures indicates the proportion of deaths due to a specific disease within a population?
Case fatality rate
ExplanationCase fatality rate indicates the proportion of deaths from a specific disease.
#14
What is the formula to calculate Relative Risk (RR)?
(Exposed cases / Total exposed) / (Unexposed cases / Total unexposed)
ExplanationRR formula compares risks between exposed and unexposed groups.
#15
What is the main advantage of using odds ratio in epidemiological studies?
It can be used in case-control studies
ExplanationOdds ratio is suitable for case-control study designs.
#16
What does the term 'p-value' represent in epidemiological research?
The probability of obtaining the observed results by chance alone
ExplanationP-value indicates the probability of results by chance alone.
#17
What is the primary purpose of conducting a case-control study?
To identify risk factors associated with a particular disease
ExplanationCase-control studies aim to identify disease risk factors.
#18
Which of the following measures the strength and direction of the relationship between two variables in epidemiological studies?
Correlation coefficient
ExplanationCorrelation coefficient measures the relationship strength and direction.