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Sex differences in the severity and natural recovery of child PTSD symptoms: a longitudinal analysis of children exposed to acute trauma

Published online by Cambridge University Press:  10 January 2022

Lucy V. Hiscox*
Affiliation:
Department of Psychology, University of Bath, Bath, UK
Sidney Bray
Affiliation:
Department of Psychology, University of Bath, Bath, UK
Abigail Fraser
Affiliation:
Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
Richard Meiser-Stedman
Affiliation:
Department of Clinical Psychology, Norwich Medical School, University of East Anglia, Norwich, UK
Soraya Seedat
Affiliation:
Medical Research Council (MRC) Unit on Anxiety and Stress Disorders, Department of Psychiatry, Stellenbosch University, Tygerberg, Western Cape, South Africa
Sarah L. Halligan
Affiliation:
Department of Psychology, University of Bath, Bath, UK Department of Psychiatry and Mental Health, University of Cape Town, Cape Town, South Africa
*
Author for correspondence: Lucy V. Hiscox, E-mail: lh2235@bath.ac.uk

Abstract

Background

Higher levels of PTSD symptoms are present among trauma-exposed females v. males in adulthood; however, much less is known about the emergence of this sex difference during development.

Methods

In a multi-study sample of 7–18-year-olds (n = 3397), we examined the effect of sex and age on the severity of PTSD symptoms after a single incident trauma at 1 month (T1), and on symptom change after a natural recovery period of 3 (T2) and 6 months (T3). PTSD scores were harmonised across measurement types, and linear regressions were used to determine sex and age effects, adjusting for study level variance and trauma type.

Results

A sex × age interaction was observed at T1 (p < 0.001) demonstrating that older age was associated with greater PTSD symptom severity in females (β = 0.008, p = 0.047), but less severe symptoms in males (β = −0.011, p = 0.014). The same pattern was observed at T2 and T3, with sex differences beginning to emerge by age 12 years. PTSD symptoms decreased naturally by ~25% at T2 with little further improvement by T3. Further, females showed a greater reduction in symptoms at T3 than males, although the same effect was not observed at T2.

Conclusions

Sex differences in PTSD symptoms become apparent during adolescence, due to opposing changes in susceptibility occurring in females and males with age. Understanding the factors contributing to these findings is likely to provide wider insight into sex-specific psychological vulnerability to trauma-related psychopathology.

Type
Original Article
Copyright
Copyright © The Author(s), 2022. Published by Cambridge University Press

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