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

We have now decided that your study is an OBSERVATIONAL ANALYTIC study.
Analytic studies generate measures of association.

Question 5: Is the "main" control group defined by...