Outcomes of isolated and multiple persistent regulatory problems at age 24 months: follow-up of the baby business randomised controlled trial

503 families reported on their infant's regulatory problems including crying, sleeping and feeding behaviours across the first two years of life. The study found that 46% of infants had one or more persistent regulatory problems, and these problems were associated with poorer child, parent and family functioning. Outcomes were poorer when children had multiple problems. The findings indicate that such problems are common, and it is essential for health practitioners to enquire about infant regulatory problems, as well as parent and family wellbeing, at repeated encounters across the first two years of life.