The Study Design Categorizer

Q1: Does the study use or collect measurements or assessments about individual humans? YES

Q2: What is the primary mode of inquiry? QUANTITATIVE

Q3: Does the investigator assign one or more interventions? NO

Q4: Are there one or more control groups? YES

Q5: The main control group is defined by EXPOSURE STATUS

Question 6: When are outcomes measured?

• At the same time as predictors
• After measurement of predictors