A study was conducted in which 5,763 British children were recruited who had either resided or not resided with a parent that smoked. These children were then followed over a 10 year period to see if there was any development of asthma.

This is an example of what type of study?

Question

A study was conducted in which 5,763 British children were recruited who had either resided or not resided with a parent that smoked. These children were then followed over a 10 year period to see if there was any development of asthma.

This is an example of what type of study?

BlackTom AI · Accepted Answer

The question describes a study where 5,763 British children who had either resided with a parent who smoked or not were followed over a 10-year period to observe the development of asthma. This setup resembles a prospective observational design that tracks exposures and outcomes over time.
Option 1: Clinical trial. A clinical trial involves random assignment of participants to an intervention or control group, with researchers controlling exposure. In this scenario, there is no randomization or assigned intervention; the researchers simply observe naturally occurring exposure (household smoking) and subsequent outcomes, so this is not a clinical trial.
Option 2: Case-control. In a case-control study, researchers start with individuals who have the outcome of interest (cases) and compare them to those without the outcome (controls), looking back to assess prior exposures. Here, the study starts with exposure status and follows participants forward to see if asthma develops, rather than starting with cases and controls, so this is not a case-control design.
Option 3: Ecological. Ecological studies compare exposures and outcomes at the group level (e.g., countries or communities) rather than at the individual level. This question describes individual children being followed over time, which rules out an ecological approach.
Option 4: Cohort. A cohort study follows a defined group of individuals over time to assess how different exposures affect the incidence of outcomes. The described design—children categorized by exposure to parental smoking and followed for 10 years to observe asthma development—fits the classic prospective cohort model.
In summary, the key features to recognize are: defined exposure groups based on parental smoking, longitudinal follow-up, and measurement of incident asthma in individuals. This aligns with a cohort study design, while the other options involve randomized trials, retrospective case-control, or group-level ecological analysis, which do not match the described setup.

PUBHEPI 2410 AU2025 (1751) Quiz Module 8: Cohort studies

A study was conducted in which 5,763 British children were recruited who had either resided or not resided with a parent that smoked. These children were then followed over a 10 year period to see if there was any development of asthma. This is an example of what type of study?

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