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Table 2 Reproducibility of repeated CFVR

From: Coronary flow velocity reserve by echocardiography: feasibility, reproducibility and agreement with PET in overweight and obese patients with stable and revascularized coronary artery disease

 

1 week (n = 13)

>1 week (n = 8)

Total (n = 21)

CFVR Mean

2.22 (0.59)

2.38 (0.60)

2.28 (0.59)

Mean difference

−0.044 (−0.13;0.044)

0.016 (−0.48;0.51)

−0.021 (−0.19;0.15)

2SD

0.29 (0.16;0.42)

1.17 (0.43;1.92)

0.73 (0.49;0.97)

CV repeated exams [%]

7 (4;10)

25 (9;40)

16 (11;21)

CV repeated exams RPP corrected [%]

12 (7;17)

17 (6;28)

14 (9;18)

CV of RPP [%]

12 (7;17)

18 (7;29)

14 (9;19)

Reliability, ICC

0.97 (0.91;0.99)

0.67 (0.05;0.92)

0.84 (0.65;0.93)

SD between-subjects

0.58 (0.39;0.85)

0.51 (0.27;0.97)

0.56 (0.40;0.78)

SD within-subjects

0.10 (0.07;0.15)

0.39 (0.24;0.63)

0.25 (0.19;0.34)

CV within-subjects [%]

5 (3;7)

16 (10;27)

11 (8;15)

  1. Estimates of reproducibility for CFVR (coronary flow velocity reserve measured by transthoracic Doppler echocardiography) for repeated measurement within 1 week, more than 1 week, and for the total population of the sub-study. CFVR is mean (SD), all other variables are estimate (CI). 2SD Two times standard deviation of differences, CV coefficient of variation, ICC intra-class correlation coefficient, RPP rate-pressure product, SD standard deviation