The relationship among NICU stressors and irritable bowel syndrome in parents during their infant stay: the mediating role of anxiety

Background: An infant requiring admission to the Neonatal Intensive Care Unit (NICU) is frequently associated with parental stress and anxiety. Irritable bowel syndrome (IBS) represents one of the most common disorders of gut-brain interaction in adult population. The primary objective of this study was to evaluate IBS symptoms in mothers and fathers of NICU infants during hospitalization. Secondary objective was to explore the relationship among NICU stressors, anxiety and IBS symptoms. Methods: Cross-sectional study. Eighty parents (mothers = 44, fathers = 36) of NICU hospitalized infants filled out validated questionnaires on IBS symptoms, anxiety and NICU stressors (i.e., Sights and Sounds, Infant's Look and Behaviour, Parental Role Alterations). Student's t test and Chi-square test were used to compare maternal and paternal IBS symptoms, prevalence and severity. The mediating effect of anxiety among NICU stressors and IBS was tested using mediation analysis. Results: Mothers scored above the clinical cut-off for IBS more frequently than fathers (59.1% vs. 44.6%). Symptoms were significantly higher in mothers as compared to fathers (p = .021). Anxiety fully mediated the effect of Sights and Sounds (β = 0.147, SE = 0.058, 95% CI: [ 0.046, 0.277]), Infant Look and Behaviour (β = 0.117, SE = 0.049, 95% CI: [0.024, 0.215]) and Parental Role Alterations (β = 0.132, SE = 0.050, 95% CI: [0.044, 0.241]) on IBS symptoms. Conclusions: Our study demonstrated for the first time that parents of NICU infants experience IBS symptoms during hospitalization and distinguished the somatic experience among mothers and fathers during their infant NICU stay. Parental experience of NICU hospitalization deserve to be studied as a potential stressful life event implying both psychological and somatic distress. Integrating tailored stress-reduction interventions sensitive to gender differences into Family Centered-Care practices is essential to reduce parental distress and support parental involvement during NICU hospitalization.