Characteristics and outcomes of infants admitted to a parent-infant inpatient psychiatric unit: A pilot study

Inpatient parent-infant psychiatric units (PIUs) are considered "gold standard" for treating maternal mental illness, with well-documented positive outcomes for mothers. However, little research addresses outcomes for infants in these units, who often face significant developmental and socio-emotional adversity. This pilot study aimed to evaluate the characteristics and progress of an Australian PIU population, focusing on the impact of PIU admission on infant outcomes. Over 3 months, 31 consecutively admitted mother-infant pairs (dyads) were assessed through interviews, observations, and standardized measures to evaluate maternal and infant characteristics and progress from admission to discharge. Maternal well-being and the mother-infant relationship improved. Infants exhibited high levels of physical (29%) and developmental concerns (80.6%). 22.6% receiving an Axis I infant mental health diagnosis. Infant socio-emotional responsiveness improved significantly, as measured by the modified Alarm-Distress Baby Scale, indicating a positive impact of PIU admission. The small sample size and reliance on clinician-observed measures limit the generalizability of the findings. PIU infants are particularly vulnerable, and PIU admission may ameliorate socio-emotional responsiveness. Further research with larger samples and extended follow-up is needed to determine the most effective intervention strategies during and after PIU admission to maximize benefits for these infants.