A prospective examination of sex differences in posttraumatic autonomic functioning

Area of Science:

• Psychophysiology
• Trauma Studies
• Cardiovascular Health

Background:

• Posttraumatic stress disorder (PTSD) is linked to autonomic dysfunction.
• Women have higher PTSD rates, but sex differences in autonomic functioning post-trauma are understudied.

Purpose of the Study:

• To investigate sex differences in autonomic functioning after trauma exposure.
• To explore how PTSD influences these sex differences.

Main Methods:

• Prospective study of 192 trauma-exposed individuals (68.2% female).
• Measured skin conductance, blood pressure (BP), heart rate (HR), and high frequency heart rate variability (HF-HRV).
• Assessed PTSD symptoms 8 weeks post-trauma.

Main Results:

• Men had higher 2-week systolic BP; women had higher 2-week HR.
• Women with PTSD exhibited the highest HR and lowest HF-HRV.
• Early skin conductance predicted later HR and HF-HRV in women who developed PTSD.

Conclusions:

• Significant sex differences exist in posttraumatic autonomic functioning.
• Sympathetic biomarker differences (BP, HR) may link PTSD to cardiovascular risk.
• Further research on sex-specific PTSD-cardiovascular risk pathways is needed.