Table 3 Number of studies evaluating each category of tests in the primary studies and systematic reviews.
Test category | Number of primary studies | Number of systematic reviews |
|---|---|---|
Clinical examination | 4 | 8 |
Imaging | 13 | 22 |
Laboratory | 36 | 11 |
Questionnaires | 0 | 3 |
Combination of different categories | 3 | 4 |