This is used to define the major points of a disease case. Epidemiological Study Designs Basic Studies Ecological- comparisons of geographical locations Cross Sectional - a survey, "snapshot in time" Case-control - compare people with and without disease to find common exposures Cohort - compare people with and without exposures to see what happens to each Randomized controlled - human experiment Advantages and Disadvantages to Study Designs Study Designs Advantages Disadvantages Time Consuming Most Scientifically Sound Unethical for Harmful Exposures Most Expensive Best Measure of Exposure Most Accurate Observational Time Consuming Study Cohort Study Expensive Good Measure of Exposure Can Study Rare Diseases Possible Time-Order Confusion Case-Control Relatively Less Expensive and Possible Error in Recalling Past Study Relatively Fast Exposures Fastest Possible Time-Order Confusion Cross-Sectional Study Least Expensive Least Confidence in Findings 2*2 Table Table which has two columns and rows for people with or without exposure and with or without disease; shows amount of people with each characteristic. Disease No Disease
This is used to define the major points of a disease case. Epidemiological Study Designs Basic Studies Ecological- comparisons of geographical locations Cross Sectional - a survey, "snapshot in time" Case-control - compare people with and without disease to find common exposures Cohort - compare people with and without exposures to see what happens to each Randomized controlled - human experiment Advantages and Disadvantages to Study Designs Study Designs Advantages Disadvantages Most Scientifically Sound Best Measure of Exposure Time Consuming Unethical for Harmful Exposures Most Expensive Cohort Study Most Accurate Observational Study Good Measure of Exposure Time Consuming Expensive Case-Control Study Can Study Rare Diseases Relatively Less Expensive and Relatively Fast Possible Time-Order Confusion Possible Error in Recalling Past Exposures Cross-Sectional Study Fastest Least Expensive Possible Time-Order Confusion Least Confidence in Findings 2*2 Table Table which has two columns and rows for people with or without exposure and with or without disease; shows amount of people with each characteristic. Disease No Disease
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