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18. A study was undertaken to investigate the effect of asbestos exposure on lung cancer among...

18. A study was undertaken to investigate the effect of asbestos exposure on lung cancer among employees at Factory A. In 2016, a group of 35,091 employees who worked at the factory from 1968 to 1994 and had cancer follow-up data available through 2015 were included in the study. Asbestos exposure was defined categorically based on whether the employee worked on site (exposed) or in the management building nearby (unexposed). The incidence rate among those who worked on site was then compared to the incidence rate among those who did not. Which type of epidemiologic study design is described above? (Select one) a. Cross-sectional study b. Case-control study c. Prospective cohort study d. Retrospective cohort study e. Clinical trial.

math   Statistics-And-Probability   
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according to me, this is a cross sectional study. As cross sectional study is a type of observational study used to analyse data from population at particular point of time. It helps to determine if exposure to particular risk factor correlates with the prevailing outcomes.

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