. Author manuscript; available in PMC: 2008 Jul 7.

Published in final edited form as: Neuropsychology. 2006 Nov;20(6):716–726. doi: 10.1037/0894-4105.20.6.716

Table 1.

Demographic, Clinical, and Background Variables

	PTSD+/ETOH+ (n = 30)			PTSD+/ETOH− (n = 37)			PTSD−/ETOH+ (n = 30)			PTSD−/ETOH− (n = 31)
Variable	M	SD	%	M	SD	%	M	SD	%	M	SD	%	F or χ²	p	Significant contrasts
Age	48.57	7.7		47.89	9.4		43.60	12.0		46.42	9.6				None
Main effect for PTSD													F(3, 124) = 3.46	.065
Main effect for ETOH													F(3, 124) = 0.384	.537
Interactive effect													F(3, 124) = 1.02	.315
Education	13.50	1.6		14.89	2.4		14.17	1.7		15.39	2.0
Main effect for PTSD													F(3, 124) = 2.69	.104
Main effect for ETOH													F(3, 124) = 13.58	.000	ETOH+ < ETOH−
Interactive effect													F(3, 124) = 0.059	.809
Gender													χ²(3, N = 128) = 0.09	.880	None
Men			93			84			96			84
Women			7			16			4			16
Ethnicity															None
Asian			3			3			0			3
Black			21			22			10			26
Hispanic			3			6			10			0
White			73			68			80			71
CAPS total score	65.16	16.93		65.13	19.66		3.07	4.81		0.87	2.08
Main effect for PTSD													F(3, 124) = 704.32	.000	PTSD+ > PTSD−
Main effect for ETOH													F(3, 124) = 0.207	.650
Interactive effect													F(3, 124) = 0.218	.641
SCL-90-Depression subscale	1.77	0.72		1.85	0.96		0.70	0.47		0.46	0.72
Main effect for PTSD													F(3, 124) = 85.14	.000	PTSD+ > PTSD−
Main effect for ETOH													F(3, 124) = 0.346	.557
Interactive effect													F(3, 124) = 1.40	.240
WAIS-III Vocabulary	46.40	10.63		50.08	9.58		51.47	7.54		53.87	8.17
Main effect for PTSD													F(3, 124) = 7.55	.007	PTSD+ < PTSD−
Main effect for ETOH													F(3, 124) = 3.56	.061
Interactive effect													F(3, 124) = 0.157	.693
LDH total drinks	83,745	86,234		21,657	38,050		45,950	41,442		15,289	44,925
Main effect for PTSD													F(3, 123) = 5.03	.027	PTSD+ > PTSD−
Main effect for ETOH													F(3, 123) = 22.17	.000	ETOH+ > ETOH−
Interactive effect													F(3, 123) = 2.55	.113
LDH 3-month drink total	90.02	209.75		26.23	54.12		166.41	240.48		53.71	105.09
Main effect for PTSD													F(1, 122) = 3.08	.082
Main effect for ETOH													F(1, 122) = 8.90	.003	ETOH+ > ETOH−
Interactive effect													F(1, 122) = 0.683	.410
Other diagnoses
MDD			27			43			3			6	χ²(3, N = 128) = 4.55	.033	PTSD+ > PTSD−
Anxiety disorders			40			30			10			3	χ²(3, N = 128) = 3.90	.048	PTSD+ > PTSD−
Past drug abuse or dependence			53			32			50			6	χ²(3, N = 128) = 18.57	.000	PTSD+ > PTSD−, ETOH+ > ETOH−
Current psychiatric medication use Traumatic event			56			30			43			26	χ²(3, N = 128) = 7.80	.050	PTSD+ > PTSD−
Vietnam combat			63			57			10			10
Gulf War combat			3			14			0			0
Military-related			24			21			17			16
Nonmilitary			13			8			46			33
None			0			0			17			42

Note. All scores are raw scores. Military-related traumas include accidents or physical or sexual assaults. Nonmilitary traumas include child abuse and accidents. PTSD+ = current diagnosis of posttraumatic stress disorder (PTSD); PTSD− = no history of diagnosis of PTSD; ETOH = ethonol, or alcohol; ETOH+ = diagnosis of alcohol abuse or dependence in the past 5 years; ETOH− = no diagnosis of alcohol abuse or dependence in the past 5 years; CAPS = Clinician Administered PTSD Scale; SCL-90-R = Symptom Checklist—90-R; WAIS—III = Wechsler Adult Intelligence Scale—Third Edition; LDH = Lifetime Drinking History; MDD = major depressive disorder.