Infant Regulatory Problems and Subsequent Behavioral Difficulties: The Mediating Role of Parenting Stress

Background/Objectives: Infant regulatory problems (RPs) are at risk of persisting and can contribute to later behavioral difficulties. Parenting stress has been identified as a risk factor associated with child RPs, but its mediating role has rarely been investigated in this context. The aim of the study was (1) to investigate whether RP symptoms were related to subsequent infant RP symptoms/toddler behavioral and emotional problems (BEPs) between two pediatric check-ups in the first 3 years of life and (2) to investigate the potential role of parenting stress as a partial mediator in the association of infant RPs and subsequent RPs/BEPs. Methods: Using data from a German cohort study (CoronaBaBY), associations between infant RPs at baseline and RPs/toddlers BEPs at follow-up (around 8 months later) were analyzed. Parenting stress was included as a mediation variable into the model. Results: In total, 725 parent–child dyads were analyzed. Mean infant age was 5.0 months (SD = 3.4). Elevated RP symptoms at baseline significantly predicted infant RP symptoms and BEPs at follow-up. Parenting stress at baseline significantly predicted feeding problems and BEPs at follow-up. Parenting stress partially mediated the associations between baseline infant RPs and follow-up RPs respectively BEPs in most models. Conclusions: Interventions should consider the partially mediating role of parenting stress, especially for the later development of BEPs. Research should aim to identify additional factors influencing infant regulatory problems and subsequent behavioral difficulties.