Table 1

Demographic, clinical and behavioural characteristics of study participants

	Group; mean ± SD

Characteristic	PTSD	Control	Statistical test	p value
Age, yr	32.5 ± 7.12	30.6 ± 7.9	t₄₉ = 0.90	0.37
Life events (LEC)^*	42.78 ± 10.27	45.42 ± 11.97	t₃₇ = 0.70	0.49
PTSD (CAPS)^*	73.44 ± 16.88	21.17 ± 12.35	t₃₇ = 9.61	< 0.001
Accuracy, % correct	81.62 ± 5.60	84.31 ± 6.32	t₄₉ = 1.67	0.10
Reaction time, ms	624 ± 58	607 ± 53	t₄₉ = 1.02	0.31

CAPS = Clinician Administered PTSD Scale; LEC = Life Events Checklist; PTSD = posttraumatic stress disorder; SD = standard deviation.
↵* Includes combat-exposed controls only.