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Intra-observer correlation of CSA. (a) Scatter plot of the CSA intra-observer correlation demonstrating the linear correlation between the first and second observing by observer A (r = 1.00, ICC = 1.00). (b) Bland–Altman plot demonstrating a mean difference of 5.490 (CI −1.702 to −12.682). CSA, cross-sectional area.
