Table 1.

Demographic and co-morbidity measures in controls and Gulf War syndrome groups

Characteristic	Controls	Syndrome 1 (Impaired cognition)	Syndrome 2 (Confusion- ataxia)	Syndrome 3 (Central neuro- pathic pain)	P value
Number of subjects	14	11	16	12
Mean years of age (SD)	61 ( 7)	51 ( 6)	63 ( 7)	57 ( 7)	<0.01
Mean years of education (SD)	13 ( 2)	14 (1)	12 ( 3)	12 ( 1)	0.15
Chronic fatigue syndrome, CDC definition (%)	0 ( 0)	1 ( 9)	1 ( 6)	1 ( 8)	0.78
Fibromyalgia, survey definition (%)	1 ( 7)	2 (18)	6 (38)	10 (83)	<0.001
Major depressive disorder, active (%)	0 ( 0)	2 (18)	3 (19)	0 ( 0)	0.12
Alcohol abuse or dependence, active (%)	4 (29)	4 (36)	6 (38)	5 (42)	0.94
Drug abuse or dependence, active (%)	2 (14)	1 (9)	0 ( 0)	2 (17)	0.35
Posttraumatic stress disorder, active (%)	0 ( 0)	2 (18)	4 (25)	3 (25)	0.20