Table 4.
Relation between planar and SPECT indices
| Correlations† | Mean values for clinical populations‡ | |||||
|---|---|---|---|---|---|---|
| PCC† | P value | ICD | NDD | RCT | P value | |
| Early | ||||||
| Planar HM | – | 1.53 ± 0.3 | 1.44 ± 0.3 | 1.71 ± 0.2 | .024 | |
| SPECT HM | 0.795 | <.001 | 1.95 ± 0.5 | 1.70 ± 0.8 | 2.52 ± 0.3 | .001 |
| SPECT MM | 0.771 | <.001 | 0.91 ± 0.3 | 0.73 ± 0.5 | 1.20 ± 0.2 | .006 |
| SPECT ML | 0.578 | <.001 | 0.87 ± 0.2 | 0.69 ± 0.3 | 0.93 ± 0.2 | .011 |
| Delayed | ||||||
| Planar HM | – | 1.40 ± 0.2 | 1.38 ± 0.4 | 1.75 ± 0.2 | <.001 | |
| SPECT HM | 0.851 | <.001 | 1.69 ± 0.6 | 1.63 ± 1.1 | 2.54 ± 0.3 | <.001 |
| SPECT MM | 0.842 | <.001 | 0.79 ± 0.3 | 0.71 ± 0.5 | 1.22 ± 0.2 | .001 |
| SPECT ML | 0.497 | <.001 | 0.85 ± 0.2 | 0.74 ± 0.3 | 0.92 ± 0.2 | .139 |
| Washout | ||||||
| Planar HM | – | 0.49 ± 0.38 | 0.48 ± 0.35 | 0.15 ± 0.13 | <.001 | |
| SPECT HM | 0.706 | <.001 | 0.41 ± 0.65 | 0.97 ± 1.32 | 0.04 ± 0.32 | .002 |
| SPECT MM | 0.359 | .010 | −0.71 ± 2.47 | 0.10 ± 0.56 | 1.38 ± 4.30 | .044 |
| SPECT ML | −0.145 | .315 | 0.18 ± 2.06 | −0.65 ± 1.90 | 1.56 ± 2.40 | .163 |
HM, Heart-to-mediastinum ratio; MM, myocardial wall-to-mediastinum ratio; ML, myocardial wall-to-lumen ratio.
†Pearson correlation analysis or Spearman’s rank correlation between the planar and the SPECT for uptake and washout indices.
‡Anova or Kruskal-Wallis analysis to determine the difference between the mean values.