Parental posttraumatic stress symptoms as a moderator of child's acute biological response and subsequent posttraumatic stress symptoms in pediatric injury patients.

OBJECTIVE: To examine how parental responses following pediatric injury may influence their child's posttraumatic stress symptoms (PTSS).
METHODS: Heart rate (HR) from 82 pediatric injury patients was measured during emergency medical services (EMSs) transport and following hospital admission. Twelve-hour urinary cortisol levels were assessed upon admission. Child PTSS and parental PTSS and general distress were assessed 6 weeks and 6 months after trauma.
RESULTS: Six-week parental PTSS predicted 6-month child PTSS even after controlling for demographics and general parent distress (DeltaR(2) = .08, p = .03). Parental PTSS moderated the relationship between (a) child cortisol levels and 6-month child PTSS (DeltaR2 = .08, p = .03) and between (b) hospital HR and 6-month child PTSS (DeltaR2 = .09, p = .03).
CONCLUSION: The present findings suggest that parental response to trauma may interact with child acute physiological responses to predict persistent child PTSS.