Table 5.

Inter-study reproducibility for qualitative perfusion parameters.

	All Subjects			Control			Case
Parameter	Mean Difference*	CoV	Perfect Agreement†	Mean Difference*	CoV	Perfect Agreement†	Mean Difference*	CoV	Perfect Agreement†
Number of ischemic segments
Global	-0.15 ± 0.88	30.6	90.7	-0.10 ± 0.57	75.7‡	96.2	-0.20 ± 1.14	24.7	85.3
LAD	-0.00 ± 0.65	72.1	89.3	-0.10 ± 0.74	210.8‡	95.2	-0.10 ± 0.57	39.2	83.3
Circumflex	-0.05 ± 0.60	78.0	90.3	-0.10 ± 0.32	210.8‡	96.2	0.00 ± 0.82	58.3	84.3
RCA	-0.07 ± 0.70	41.0	93.0	-0.10 ± 0.32	126.5‡	97.6	-0.25 ± 0.89	27.6	88.6
Transmural ischemia index
Global	-0.03 ± 0.10	8.1	90.7	-0.04 ± 0.11	9.7	96.2	-0.03 ± 0.09	7.1	85.3
LAD	-0.05 ± 0.29	22.8	89.3	0.00 ± 0.15	13.3	95.2	0.11 ± 0.38	26.7	83.3
Circumflex	-0.04 ± 0.21	17.6	90.3	-0.08 ± 0.18	16.5	96.2	0.01 ± 0.23	18.1	84.3
RCA	-0.04 ± 0.17	13.4	93.0	-0.02 ± 0.06	5.6	97.6	-0.07 ± 0.24	16.8	88.6
Hypoenhancement ischemia index
Global	-0.04 ± 0.13	9.4	81.1	-0.01 ± 0.06	5.4	94.2	-0.07 ± 0.17	11.1	67.9
LAD	0.06 ± 0.39	28.5	78.9	0.06 ± 0.14	12.1	90.3	-0.04 ± 0.25	35.1	67.2
Circumflex	-0.05 ± 0.22	17.3	86.4	-0.07 ± 0.21	18.6	98.1	-0.08 ± 0.24	17.0	74.5
RCA	-0.11 ± 0.25	16.8	77.9	-0.07 ± 0.14	11.0	95.2	-0.06 ± 0.28	19.2	61.4
Infarct index
Global	-0.00 ± 0.06	4.7	96.0	0.00 ± 0.00	0.0	100.0	0.00 ± 0.08	6.1	94.2
LAD	0.06 ± 0.39	4.2	95.4	0.00 ± 0.00	0.0	100.0	0.00 ± 0.07	5.5	96.7
Circumflex	-0.05 ± 0.22	6.4	97.1	0.00 ± 0.00	0.0	100.0	-0.03 ± 0.11	7.7	94.2
RCA	-0.11 ± 0.25	9.6	95.3	0.00 ± 0.00	0.0	100.0	0.04 ± 0.17	11.8	90.9

Values are mean ± SD, CoV (%), perfect agreement (%). LAD = left anterior descending; RCA = right coronary artery.

*Mean difference between first and second study.

^†Percentage of segments with perfect agreement in ischemia grading between the two studies.

^‡CoV is a poor measure of reproducibility due to the average of measurements approximating zero.