Table 2. Traumatic events in a military context, on overseas deployment, and over lifetime.

			Soldiers deployed overseas (n = 1483)		Control group (n = 889)
			n	W % (95% CI)	n	W % (95% CI)	p-value
Traumatic events during deployment
% suffering at least one event			1323	85.5 (83.3 to 87.5)		–*2
Mean (95% CI), SD*1			6.2	(5.9 to 6.5), 5.3		–*2
Traumatic personal events during deployment
% suffering at least one event			394	24.2 (21.9 to 26.7)	97	11.1 (8.2 to 14.9)	0.000
Mean (95% CI), SD*1			1.2	(1.2 to 1.3), 0.5	1.0	(1.0 to 1.1), 0.1	0.000
Other traumatic events (lifetime)
% suffering at least one event			604	40.1 (37.3 to 42.9)	385	43.6 (38.2 to 49.6)	0.258
Mean (95% CI), SD*1			1.6	(1.5 to 1.7), 0.9	1.5	(1.4 to 1.7), 1.0	0.434
Total traumatic events (lifetime)
% suffering at least one event			754	49.2 (46.4 to 52.1)	429	49.9 (44.3 to 55.6)	0.833
Mean (95% CI), SD*1			2.0	(1.9 to 2.1), 1.3	1.8	(1.6 to 1.9), 1.1	0.009

^*1Mean of those suffering at least one event, regardless of frequency;

^*2Applicable only to soldiers deployed overseas 95% CI, 95% confidence interval; W %, weighted percentage