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Table 1 Intra-observer, inter-experiment and inter-observer variability analysis.

From: Intra-observer, inter-experiment and inter-observer variability of left ventricular volumes and mass measurements in mice using an 11.7 Tesla MRI

Intraobserver variability LV mass EDV ESV SV EF
Mean ± SD data 1 93,00 ± 8,018 76,57 ± 6,629 42,14 ± 8,606 34,29 ± 2,792 47,86 ± 6,674
Mean ± SD data 2 93,71 ± 7,643 76,86 ± 6,857 40,00 ± 10,04 37,14 ± 3,744 52,43 ± 8,569
Bias -0,7143 -0,2857 2,143 -2,8571 -4,5714
Limits of agreement -12,62 to 11,19 -3,990 to 3,418 -11,55 to 15,84 -15,43 to 9,715 -23,23 to 14,09
SDD 6,07 1,89 6,99 6,41 9,52
Coefficient of variability 6,51% 2,46% 1,70% 17,96% 18,98%
r square 0,92 0,99 0,92 0,58 0,84
Interexperiment variability LV mass EDV ESV SV EF
Mean ± SD data 1 93,00 ± 8,018 76,57 ± 6,629 42,14 ± 8,606 34,29 ± 2,792 47,86 ± 6,674
Mean ± SD data 3 96,43 ± 7,970 73,14 ± 7,557 41,29 ± 9,526 31,71 ± 3,834 47,14 ± 7,658
Bias -3,429 3,429 0,8571 2,571 0,7143
Limits of agreement -20,70 to 13,84 -13,46 to 20,32 -13,25 to 14,96 -8,450 to 13,59 -12,80 to 14,23
SDD 8,81 8,619 7,198 5,623 6,897
Coefficient of variability 9,64% 12% 17,25% 17,04% 14,52%
r square 0,83 0,81 0,92 0,71 0,89
Interobserver variability LV mass EDV ESV SV EF
Mean ± SD data 2 93,71 ± 7,643 76,86 ± 6,857 40,00 ± 10,04 37,14 ± 3,744 52,43 ± 8,569
Mean ± SD data 4 95,14 ± 8,379 67,57 ± 7,593 34,29 ± 7,296 33,57 ± 1,360 52,71 ± 5,384
Bias -1,43 9,29 5,71 3,57 -0,29
Limits of agreement -12,57 to 9,71 -1,43 to 20,00 -10,59 to 22,02 -18,22 to 25,36 -22,16 to 21,59
SDD 5,48 5,47 8,32 11,12 11,16
Coefficient of variability 6,02% 8% 22,40% 31,45% 21,23%
r square 0,94 0,93 0,97 0,03 0,84