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 CASE STATUS

Q6: Are case and control in the same person? YES

Your Study Design Is...

• Case Crossover

Additional Descriptors:

• Timing of measurements to participant selection: one of retrospective, prospective
• Are cases and controls (or exposed and unexposed) drawn from the same cohort/sample? Yes = nested, No = non-nested [aka double cohort for cohort studies]
• Matching (subsamples matched on covariates or not)
• Case definition: one of prevalence, incidence
• Control group subtype: one of family-based, not family-based
• Control group timing: one of historical, contemporaneous [is this needed?]
• Sampling method: one of probability, non-probability

These additional descriptors in the Study Design presentation are listed on the Observational Studies slide. Do they only pertain Case Crossover studies?

-- SimonaCarini - 23 Dec 2008