Table 5.
Heart-to-background ratios compared within each group
| Ratio | Stress | Stress | ||
|---|---|---|---|---|
| MPI1 | MPI2 | Difference (95% CI*) | P value† | |
| Ex-Reg (n = 538) | ||||
| Heart-to-liver | 1.05 (0.40) | 0.94 (0.37) | 0.10 (0.10 to 0.10) | <0.001 |
| Heart-to-gut | 1.12 (0.44) | 0.99 (0.40) | 0.15 (0.10 to 0.20) | <0.001 |
| Heart-to-liver/gut | 1.02 (0.30) | 0.90 (0.26) | 0.10 (0.10 to 0.10) | <0.001 |
| Regadenoson (n = 535) | ||||
| Heart-to-liver | 0.96 (0.37) | 0.95 (0.36) | 0.00 (0.00 to 0.00) | |
| Heart-to-gut | 1.05 (0.43) | 0.99 (0.39) | 0.05 (0.00 to 0.10) | NC |
| Heart-to-liver/gut | 0.94 (0.27) | 0.91 (0.26) | 0.05 (0.00 to 0.10) | |
All values are mean ± SD
CI, Confidence interval; MPI, myocardial perfusion imaging; NC, not calculated; SD, standard deviation
*Hodges-Lehmann CI
†Wilcoxon signed-rank test for Ex-Reg only