Variable And Measurement Guide

Use

Use this when reading a table for the first time.

Variable Types

• Numeric: a measured or counted number.
• Categorical: names or groups.
• Ordinal: ordered categories where gaps may not be equal.
• Count: number of events.
• Rate: events divided by exposure or population.
• Proportion: part divided by whole.
• Date or time: values tied to sequence or duration.

Check

For each variable, ask what was measured, how it was measured, who or what it describes, and what errors may exist.