Asked by Frank Writer on Jul 31, 2024
Verified
Epidemiologists decided to investigate the effect of sunscreens on sunburns.They ran an epidemiologic study to see the association of sunscreens and sunburns.Overall,460 people have enrolled in the study.Investigators randomly allocated 230 people to the treatment group (sunscreens) and 230 to the control group (placebo) .They exposed those 460 people to the high mountain trail on a sunny day.At the end of the study,30 people developed sunburns in the sunscreen group and 130 people developed sunburns in the placebo group.What type of study design is this?
A) Cross-sectional study
B) Prospective cohort study
C) Case-control study
D) Randomized trial
E) Case-control study.
Epidemiologic Study
Research conducted to study the distribution and determinants of health-related states or events in specific populations, and to apply this study to control health problems.
Randomized Trial
A study design that randomly assigns participants into an experimental group or a control group to measure the effect of a variable.
Placebo Group
A group of participants in a clinical trial that receives a sham treatment to compare the actual treatment's effectiveness against no treatment.
- Understand different epidemiologic study designs and their characteristics.
- Identify the association between exposure (sunscreens) and outcome (sunburns) in epidemiologic studies.
- Distinguish between randomized trials and observational studies.
Verified Answer
Learning Objectives
- Understand different epidemiologic study designs and their characteristics.
- Identify the association between exposure (sunscreens) and outcome (sunburns) in epidemiologic studies.
- Distinguish between randomized trials and observational studies.
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