Study design for qualitative methods
Method comparison study requirements and dataset layout for qualitative methods.
Requirements
- 2 qualitative (binary / semi-quantitative) variables.
Dataset layout for a two qualitative tests
Use a column for the reference/comparative method, and a column for the test method; each row has the values of the variables for a case (Subject).
| Subject (optional) | Reference/Comparative method | Test method |
|---|---|---|
| 1 | + | + |
| 2 | - | - |
| 3 | + | + |
| 4 | - | - |
| 5 | - | - |
| 6 | - | - |
| 7 | + | + |
| 8 | + | - |
| 9 | - | - |
| 10 | - | - |
| … | … | … |
Frequency form dataset layout for two qualitative tests
Use a column for the reference/comparative method, and a column for the test method and a column for the number of cases (Frequency); each row has the values of the variables and the frequency count.
| Reference / Comparative method | Test method | Count |
|---|---|---|
| + | + | 32 |
| + | - | 1 |
| - | + | 3 |
| - | - | 38 |