Fig. 2

Mediation effects of maternal HOMA-IR (log-transformed) and cord C-peptide (log-transformed) on the relationship between short IPI and the risks of failing the communication domain. The total indirect effect consists of 3 pathways. Pathway 1 (Short IPI → HOMA-IR → Failure to communication): 2.1%; Pathway 2 (Short IPI → Cord blood C-peptide → Failure to communication): 11.3%; Pathway 3 (Short IPI → HOMA-IR → Cord blood C-peptide → Failure to communication): 0.5%