Figure 6

Comparison of the β diversity and occupancy of the top two bacteria species between the infants with siblings and those without siblings (a) Comparison of β diversity of the intestinal microbiome between infants with and without siblings. (b) Bifidobacteria and Bacteroides occupancies between infants with siblings (Sib) and without siblings (Non-Sib), shown as box-whisker plots at each age. The Sib and non-Sib groups included 67 and 63 infants at 1 month (130 in total), 61 and 66 infants at 3 months (127 in total), and 66 and 60 infants at 6 months (126 in total). The significance level was set at 5%. *p < 0.05, ***p < 0.001 using Mann–Whitney U-test. This figure was generated using SAS version 9.4 (https://www.sas.com).