FREE Bachelor of Health Science Epidemiology Questions and Answers

Question 1

This is an example of conducting a survey with a representative sample of residents to inquire about their weekly exercise habits and whether they have been diagnosed with heart disease or not.

Accepted Answer

Observational Cross - sectional

Answer

A cross-sectional study involves collecting data from a population or a representative sample at a single point in time. In this example, researchers are surveying residents once to simultaneously gather information on both exercise habits (exposure) and heart disease diagnosis (outcome). This 'snapshot' approach allows for the assessment of prevalence and associations between variables at that specific moment, without following individuals over time.

Question 2

People with new-onset Lyme disease were asked how often they walked in the forest, used repellents, and wore short sleeves as well as pants. The same questions were asked of twice as many people without Lyme disease from the same doctor's office. Then, the results from people with and without lyme disease were compared.

Accepted Answer

Observational case study

Answer

This describes a case-control study, which is a type of observational study. Researchers identify individuals with a disease (cases, here Lyme disease) and a comparable group without the disease (controls). They then retrospectively compare the exposure histories (e.g., forest walking, repellent use) between the two groups to identify potential risk factors. The term 'observational case study' is likely a simplified or alternative phrasing for 'observational case-control study'.

Question 3

The people who have been studied were children whom are part of a health maintenance organization. At 2 months, each child was given one of the two vaccines against rotavirus infection based on a chance draw. After two weeks, a nurse reached out to the parents and asked if their children had any of a list of side effects.

Accepted Answer

Experimental

Answer

This is an experimental study because the researchers actively intervene by assigning different treatments (two types of rotavirus vaccines) to the study participants based on a 'chance draw,' which indicates randomization. The purpose is to observe the effects of these interventions (side effects) and compare them between the groups. This direct manipulation of an exposure distinguishes experimental studies from observational ones.

Question 4

"Distribution" in the definition of epidemiology means:

Accepted Answer

All of the above

Answer

In epidemiology, 'distribution' refers to the patterns of health events in a population. This includes analyzing health outcomes by 'who' (person characteristics like age, sex, race), 'when' (time trends like seasonal, annual, or epidemic periods), and 'where' (place characteristics like geographic location or environmental factors). Understanding these aspects helps identify populations at risk and potential causes.

Question 5

In most cases, "determinants" in the definition of epidemiology means:

Accepted Answer

Causes, Risk factors, Sources, Agents

Answer

'Determinants' in epidemiology refers to the factors or events that bring about a change in health. These include specific causes of disease, such as infectious agents or genetic predispositions, as well as risk factors that increase the likelihood of disease. It also encompasses sources of exposure and the agents themselves that lead to health outcomes.

BHS - Bachelor of Health Science Practice Test

BHS - Bachelor of Health Science Practice Test

FREE Bachelor of Health Science Epidemiology Questions and Answers