QuestionSBA
QuestionChoice
These studies collect data from a population at a single point in time to assess the prevalence of a particular condition or characteristic.
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c
Cross-sectional studies
QuestionChoice
In cohort studies, a group of individuals (the cohort) is followed over time to determine the incidence of an outcome and identify risk factors.
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b
Cohort studies
QuestionChoice
These are detailed descriptions of individual cases, often used to report rare or unique medical conditions or treatments.
10026714
e
Case reports
QuestionChoice
Case–control studies bring together two groups, a case study group and a control group. The case study group has a particular attribute while the control group does not. The two groups are then compared, to see if the case group exhibits a particular characteristic more than the control group.
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a
Case-control study
QuestionChoice
These are experimental studies where participants are randomly assigned to different groups (e.g., treatment and control) to assess the effects of an intervention or treatment.
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d
Randomised controlled trials
Concept
Chapter
2693
4353
Observational studies
Topic
178
Medical Statistics
17740
In a study related to lung cancer, researchers investigate the effect of quitting smoking. They compare a group of smokers and ex-smokers and monitor the instances of lung carcinoma.

What type of study is this?
a