To identify the causes of diseases

To develop treatments for diseases

To prevent the spread of diseases

To study the distribution of diseases

Observational studies

Experimental studies

Case-control studies

Cohort studies

Incidence is the number of new cases of a disease in a population over a specific period of time, while prevalence is the total number of cases of a disease in a population at a specific point in time.

Incidence is the number of new cases of a disease in a population over a specific period of time, while prevalence is the number of deaths from a disease in a population over a specific period of time.

Incidence is the number of cases of a disease in a population at a specific point in time, while prevalence is the number of new cases of a disease in a population over a specific period of time.

Incidence is the number of deaths from a disease in a population over a specific period of time, while prevalence is the total number of cases of a disease in a population at a specific point in time.

Confounding variables are variables that are associated with both the exposure and the outcome, and can therefore bias the results of an epidemiological study.

Confounding variables are variables that are associated with the exposure but not the outcome, and can therefore be ignored in an epidemiological study.

Confounding variables are variables that are associated with the outcome but not the exposure, and can therefore be ignored in an epidemiological study.

Confounding variables are variables that are not associated with either the exposure or the outcome, and can therefore be ignored in an epidemiological study.

To combine the results of multiple studies to increase the sample size and statistical power.

To identify the most common risk factors for a disease.

To develop new treatments for a disease.

To prevent the spread of a disease.

Cross-sectional study

Case-control study

Cohort study

Randomized controlled trial

A risk factor is a variable that increases the likelihood of developing a disease, while a cause is a variable that is necessary for a disease to occur.

A risk factor is a variable that decreases the likelihood of developing a disease, while a cause is a variable that is necessary for a disease to occur.

A risk factor is a variable that is associated with a disease, while a cause is a variable that is not associated with a disease.

A risk factor is a variable that is not associated with a disease, while a cause is a variable that is associated with a disease.

To identify the risk factors for a disease.

To determine the incidence of a disease.

To study the natural history of a disease.

To evaluate the effectiveness of a treatment.

To identify the risk factors for a disease.

To determine the incidence of a disease.

To study the natural history of a disease.

To evaluate the effectiveness of a treatment.

Incidence

Prevalence

Mortality

Morbidity

To identify the risk factors for a disease.

To determine the incidence of a disease.

To study the natural history of a disease.

To evaluate the effectiveness of a treatment.

Relative risk is the risk of developing a disease in a group exposed to a risk factor compared to the risk of developing the disease in a group not exposed to the risk factor, while absolute risk is the overall risk of developing a disease in a population.

Relative risk is the overall risk of developing a disease in a population, while absolute risk is the risk of developing a disease in a group exposed to a risk factor compared to the risk of developing the disease in a group not exposed to the risk factor.

Relative risk is the risk of developing a disease in a group exposed to a risk factor compared to the risk of developing the disease in a group not exposed to the risk factor, while absolute risk is the difference in the risk of developing a disease in a group exposed to a risk factor and the risk of developing the disease in a group not exposed to the risk factor.

Relative risk is the difference in the risk of developing a disease in a group exposed to a risk factor and the risk of developing the disease in a group not exposed to the risk factor, while absolute risk is the overall risk of developing a disease in a population.

To summarize the evidence on a specific topic.

To identify the risk factors for a disease.

To determine the incidence of a disease.

To study the natural history of a disease.

Population-based studies are conducted in a representative sample of the population, while hospital-based studies are conducted in a sample of patients who have been admitted to a hospital.

Population-based studies are conducted in a sample of patients who have been admitted to a hospital, while hospital-based studies are conducted in a representative sample of the population.

Population-based studies are conducted in a sample of patients who have been admitted to a hospital, while hospital-based studies are conducted in a sample of patients who have been discharged from a hospital.

Population-based studies are conducted in a sample of patients who have been discharged from a hospital, while hospital-based studies are conducted in a sample of patients who have been admitted to a hospital.

To ensure that epidemiological studies are conducted in a responsible and ethical manner.

To identify the risk factors for a disease.

To determine the incidence of a disease.

To study the natural history of a disease.