Statistics
Continuous data are presented as mean ± SD. Agreement between methods was expressed according to the Bland-Altman method (14), including calculation of bias and 95 % limits of agreement (LoA). Examiner variability was assessed by the coefficient of variation (CV), and correlation was assessed by Pearson’s correlation coefficient. Time analysis was compared by a paired t-test and p < 0.05 was considered significant. Data analysis was performed using R and R studio software (version 1.0.143).