Table 5.

Incidence and persistence of outcomes. Values are presented with 95% confidence intervals

	Incidence			Persistence
Cohort	Risk	Crude odds ratio	Corrected odds ratio*	Risk	Crude odds ratio	Corrected odds ratio*
General health questionnaire cases:
Gulf	20.2 (16.4 to 24.0)	1.0	1.0	61.8 (57.3 to 66.3)	1.0	1.0
Bosnia	21.2 (16.7 to 25.8)	1.1 (0.7 to 1.5)	0.9 (0.6 to 1.4)	58.9 (51.9 to 65.8)	0.9 (0.6 to 1.1)	1.1 (0.7 to 1.6)
Era	15.4 (11.4 to 19.4)	0.7 (0.5 to 1.1)	0.7 (0.5 to 1.1)	48.4 (41.0 to 55.9)	0.8 (0.6 to 1.1)	0.6 (0.4 to 0.8)
Fatigue cases:
Gulf	18.8 (14.4 to 23.1)	1.0	1.0	69.7 (66.4 to 73.0)	1.0	1.0
Bosnia	19.8 (15.1 to 24.4)	1.1 (0.7 to 1.6)	0.9 (0.6 to 1.5)	59.9 (54.2 to 65.6)	0.6 (0.5 to 0.9)	0.7 (0.5 to 1.0)
Era	11.2 (7.5 to 15.0)	0.6 (0.3 to 0.9)	0.5 (0.3 to 0.9)	58.2 (53.1 to 63.4)	0.6 (0.5 to 0.8)	0.7 (0.5 to 0.9)
Post-traumatic stress reaction cases:
Gulf	5.0 (3.6 to 6.4)	1.0	1.0	51.8 (44.8 to 58.9)	1.0	1.0
Bosnia	4.0 (2.5 to 5.5)	0.8 (0.5 to 1.3)	0.8 (0.4 to 1.5)	38.9 (24.3 to 53.3)	0.6 (0.3 to 1.2)	0.8 (0.4 to 1.8)
Era	4.6 (3.0 to 6.2)	0.9 (0.6 to 1.5)	0.9 (0.5 to 1.5)	54.8 (37.8 to 71.9)	1.1 (0.5 to 2.4)	1.2 (0.6 to 2.7)

^*Controlled for demographic variables (age, sex, rank, marital status).