Study design
Reference interval study requirements and dataset layout.
Requirements
- A quantitative variable of the reference values.
- 1 or more factor variables.
Dataset layout
Use a column for the variable (Reference value), and optionally additional columns for each partition factor (Sex); each row has the values of the variables for a case (Subject).
| Subject (optional) | Sex (optional) | Reference value |
|---|---|---|
| 1 | Male | 121 |
| 2 | Male | 118 |
| 3 | Female | 124 |
| 4 | Female | 120 |
| 5 | Male | 116 |
| 6 | Male | … |
| 7 | Female | 100 |
| 8 | Male | 115 |
| 9 | Female | 102 |
| 10 | Female | 98 |
| 11 | Male | 118 |
| … | … | … |