Table 2.

Age and time spent on the battlefield in posttraumatic stress disorder (PTSD)-affected veterans with and without disorder of extreme stress not otherwise specified (DESNOS)

	No. of patients with
	PTSP and DESNOS		PTSP only		t test; U*	P
Age, mean ± standard deviation (years)	106	45.29 ± 7.30	128	45.45 ± 7.22	-0.16	0.873
Time (months) on battlefront, median (range)	74	37 (5-103)	107	38 (1-96)	0.425	0.671

*Mann-Whitney U test.