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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