3.4.2.2. Betweenness centrality
In the control group, the community childcare doctor had the largest betweenness centrality, 256.5; meanwhile, parent 1145 and parent 1224 had the largest betweenness centrality when compared with other parents (64.7 and 53.5, respectively), which demonstrated that they had acquired considerable information about children aged 0–3, and could play an important role in regard to facilitating communication among group members (In the intervention group, parent 1003 showed the largest betweenness centrality (1,706.5), while parent 1004, parent 1010, parent 1011, parent 1015, and parent 1017 also showed larger betweenness centralities than the other parents (157.0, 133.9, 122.6, 115.0, and 112.5, respectively). The community childcare doctor's betweenness centrality was 0, which demonstrated that, after receiving the intervention, some parents could resolve certain problems through mutual communication (