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Change in Bristol Stool Scale score before and after the use of the probiotic Bifidobacterium bifidum G9‐1. (a) The Bristol Stool Scale scores of observation 1 (n = 38), observation 2 (n = 38) and observation 3 (n = 37) are shown. Change in Bristol Stool Scale score was evaluated using Wilcoxon signed‐rank test. (b) The differences in the proportions of Bristol Stool Scale scores ≥3.5 to <4.5 were evaluated by the McNemar test.
