Firefighters in Maryland who were free of cancer in 1991 and who agreed to parti

Question

Firefighters in Maryland who were free of cancer in 1991 and who agreed to participate were enrolled into a study to examine the association of occupational dust exposures with various cancers. As a condition of enrollment, the firefighters gave the researchers permission to link their personal information to state cancer registries, and agreed to complete an initial intake evaluation to collect data on risk factors for cancer (e.g. family history, diet. Researchers followed the firefighters in the cancer registries until death, loss-to follow-up or 1996. Based on the information provided above: Identify the type of study design. What are strengths of this design? What are some disadvantages of this type of epidemiologic study design (in general)? List potential sources of bias for the study described above. What other epidemiologic design could you use? Why? Strengths and weaknesses?

Explanation / Answer

The type of study design is Cohort study. It is also called prospective observational study. Strengths of cohort study: It is suitable for long term observation and high risk diseases. It is useful for pollution related studies like long term exposure to pollutants in the atmosphere. This design study is suitable for exposure and outcome situations. Clear and vast range of outcomes can be specified.

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