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Table 2 Intra-study reproducibility data in healthy and heart failure groups

From: Diffuse myocardial fibrosis evaluation using cardiac magnetic resonance T1 mapping: sample size considerations for clinical trials

  Healthy subjects Heart failure subjects
  λ ECV λ ECV
Mean ± SD 0.442 ± 0.037 0.267 ± 0.028 0.481 ± 0.052 0.286 ± 0.034
Min: Max 0.367 : 0.530 0.202 : 0.325 0.368 : 0.634 0.240 : 0.398
Mean Diff ± SD 0.012 ± 0.009 0.007 ± 0.006 0.012 ± 0.028 0.007 ± 0.017
Corr Coef 0.97 0.98 0.86 0.88
CV 0.020 0.022 0.058 0.059
BA limit -0.03 : 0.006 -0.018 : 0.004 -0.068 : 0.043 -0.041 : 0.026
  1. λ: partition coefficient; ECV: extracellular volume fraction; Mean Diff, mean difference; Corr Coef, correlation coefficient; CV, coefficient of variability; BA limit, Bland-Altman limits of agreement.