1. State whether it will experimental or observational 2. If observational, identify which type specifically (retrospective cohort, prospective cohort, case-control, cross-sectional, ecological) 3. Briefly explain how you can tell what type of study it is. We plan to select a large healthy group of 4000 50-year-old people from the general population and give them a questionnaire to fill out. One of the questions concerns the use of BZDs. We are going to follow them for 5 years and compare how many developed kidney disease among those who said yes to BZD consumption and among those who said no to BZD consumption.

MATLAB: An Introduction with Applications
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1. State whether it will experimental or observational

2. If observational, identify which type specifically (retrospective cohort, prospective cohort, case-control, cross-sectional, ecological) 

3. Briefly explain how you can tell what type of study it is.

  1. We plan to select a large healthy group of 4000 50-year-old people from the general population and give them a questionnaire to fill out. One of the questions concerns the use of BZDs. We are going to follow them for 5 years and compare how many developed kidney disease among those who said yes to BZD consumption and among those who said no to BZD consumption.
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