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Table 1 Reproducibility in the whole cohort

From: Left atrial 4D flow cardiovascular magnetic resonance: a reproducibility study in sinus rhythm and atrial fibrillation

 

1

2

3

4

    
 

Intra-observer

N = 84

Inter-observer

N = 75

Same-day rescan

N = 85

Interval Scan

N = 74

p value (1 vs. 2)

p value (1 vs. 3)

p value (2 vs. 3)

p value (3 vs. 4)

LA stasis, %

        

 CV (95% CI)

0.032 (0.023–0.041)

0.073 (0.052–0.097)

0.101 (0.080–0.124)

0.144 (0.116–0.175)

< 0.001

< 0.001

0.076

0.015

 Bias (BA limits)

0.01 (− 0.02 to 0.02)

0.00 (− 0.09 to 0.07)

0.00 (− 0.09 to 0.09)

− 0.01 (− 0.16 to 0.14)

    

LA peak velocity, m/s

        

 CV (95% CI)

0.012 (0.009–0.015)

0.080 (0.039–0.131)

0.065 (0.042–0.093)

0.068 (0.058–0.079)

0.007

< 0.001

0.645

0.795

 Bias (BA limits)

0.00 (− 0.01 to 0.01)

0.01 (− 0.09 to 0.07)

0.00 (− 0.05 to 0.06)

0.00 (− 0.05 to 0.06)

    

LA mean velocity, m/s

        

 CV (95% CI)

0.010 (0.008–0.013)

0.037 (0.025–0.051)

0.051 (0.038–0.064)

0.076 (0.063–0.088)

< 0.001

< 0.001

0.134

0.007

 Bias (BA limits)

0.00 (0.00 to 0.00)

0.00 (− 0.01 to 0.01)

0.00 (− 0.020 to 0.022)

0.00 (− 0.03 to 0.03)

    

LA vorticity, rad

        

 CV (95% CI)

0.012 (0.010–0.014)

0.081 (0.041–0.126)

0.072 (0.052–0.094)

0.074 (0.059–0.090)

0.002

< 0.001

0.816

0.875

 Bias (BA limits)

0.00 (− 0.73 to 0.73)

− 0.17 (− 4.67 to 4.32)

− 0.01 (− 4.12 to 4.15)

0.41 (− 3.90 to 4.73)

    

LA vortex volume, ml

        

 CV (95% CI)

0.076 (0.053–0.099)

0.112 (0.083–0.143)

0.086 (0.059–0.115)

0.108 (0.080–0.137)

0.045

0.564

0.172

0.254

 Bias (BA limits)

− 1.12 (− 5.44 to 3.05)

− 1.18 (− 6.45 to 4.10)

0.42 (− 3.22 to 4.06)

− 0.51 (− 7.32 to 60.30)

    
  1. Within-subject coefficients of variation (CV, reported as proportion) are presented with bootstrapped 95% CIs (1000 bootstraps). Mean bias and Bland–Altman (BA) 95% limits of agreement are also reported. p values are obtained by bootstrapped differences (10,000 bootstraps) between CV values for each parameter. Significant p values (< 0.05) are shown in italic
  2. LA left atrial