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2 × 2 contingency table of the performance of temporal artery biopsy and ultrasound.
| Temporal artery biopsy | ||||
|---|---|---|---|---|
| Positive | Negative | Total | ||
| Ultrasounda | Positive | 20 | 11 | 31 |
| Negative | 4 | 43 | 47 | |
| Total | 24 | 54 | 78 | |
aA Positive ultrasound for GCA was defined as positive compression sign of one or more of the temporal artery branches.
A positive biopsy was defined as having inflammation through one or more layers of the main artery wall and the presence of giant cells.
