Figure 3

Bland-Altman analysis of blood flow in the lower abdomen for repeated measurements. Bland-Altman analysis revealed no systematic bias (fixed bias or proportional bias) between two measurements. The difference (y-axis) and mean (x-axis) in blood flow in lower abdomen (Ab) between two measurements over three different days. Results are based on 180 samplings (comparison between 1^st and 2^nd, 2^nd and 3^rd, and 3^rd and 1^st measurements) in 60 participants. The solid line indicates bias and the dashed lines are the limits of agreement of ± 1.96 SD (± 2 SD on the figure). The open circles correspond to 1^st vs. 2^nd measurement. The grey circles correspond to 2^nd vs. 3^rd measurement. The closed circles correspond to 3^rd vs. 1^st measurement. Material reproduced, with data added to the figure adapted from Osada et al. [12], with permission from IOP Publishing Ltd.