Comparison of the chilled to ambient hand ratios derived from the 99mTc-HDP radioactivity curve of patients with Raynaud’s phenomenon (RP) and controls. Values are mean ± SD.
| Group | RP (n = 57), mean ± SD | Cutoff Value | Control (n = 60), mean ± SD |
|---|---|---|---|
| Initial slope ratio | 0.24 ± 0.19 | 0.51 | 0.79 ± 0.17 |
| First peak height ratio | 0.28 ± 0.18 | 0.58 | 0.79 ± 0.20 |
| 30-second AUC ratio | 0.35 ± 0.20 | 0.57 | 0.78 ± 0.19 |
| Blood pool uptake ratio | 0.52 ± 0.18 | 0.76 | 0.84 ± 0.10 |
All ratios differed significantly (p < 0.0001) between the 2 groups using the t test. AUC: area under the radioactivity curve.