Table 3.

Summary of moderating effects of NU and RTP on relationship between PTSD and average weekly alcohol use

Average weekly alcohol use
NU					RTP
Variable	β	t	P	ΔR2	Variable	β	t	P	ΔR2
Step 1					Step 1
Gender	−.092	−1.538	.125	.060†	Gender	−.112	−1.873	.062	.068‡
Ethnicity	−.134	−2.238	.026		Ethnicity	−.120	−2.006	.042
Smoking status	.174	2.902	.004		Smoking status	.191	3.184	.002
Step 2					Step 2
Gender	−.090	−1.496	.136	.005	Gender	−.109	−1.821	.070	.005
Ethnicity	−.136	−2.278	.024		Ethnicity	−.121	−2.032	.043
Smoking status	.182	3.026	.003		Smoking status	.199	3.307	.001
Lifetime trauma	−.074	−1.226	.221		Lifetime trauma	−.073	−1.225	.222
Step 3					Step 3
Gender	−.092	−1.564	.119	.034†	Gender	−.118	−1.993	.047	.035†
Ethnicity	−.139	−2.377	.018		Ethnicity	−.119	−2.027	.044
Smoking status	.164	2.749	.006		Smoking status	.182	3.057	.002
Lifetime trauma	−.117	−1.929	.055		Lifetime trauma	−.119	−1.965	.050
PTSD severity	.191	3.153	.002		PTSD severity	.195	3.215	.001
Step 4					Step 4
Gender	−.104	−1.760	.080	.014*	Gender	−.121	−2.066	.040	.017*
Ethnicity	−.136	−2.332	.020		Ethnicity	−.100	−1.699	.090
Smoking status	.148	2.472	.014		Smoking status	.178	3.008	.003
Lifetime trauma	−.132	−2.167	.031		Lifetime trauma	−.113	−1.876	.062
PTSD severity	.157	2.506	.013		PTSD severity	.204	3.382	.001
NU	.125	1.996	.047		RTP	.131	2.227	.027
Step 5					Step 5
Gender	−.104	−1.758	.080	.000	Gender	−.121	−2.072	.039	.003
Ethnicity	−.136	−2.316	.021		Ethnicity	−.100	−1.706	.089
Smoking status	.149	2.486	.014		Smoking status	.184	3.092	.002
Lifetime trauma	−.131	−2.152	.032		Lifetime trauma	−.117	−1.932	.054
PTSD severity	.153	2.398	.017		PTSD severity	.198	3.265	.001
NU	.124	1.965	.050		RTP	.130	2.197	.029
NU*PTSD severity	.018	.307	.759		RTP*PTSD severity	−.056	−.953	.341

NU = negative urgency; RTP = risk-taking propensity; PTSD = posttraumatic stress disorder.

^*p < 0.05.

^†p < 0.01.

^‡p < 0.001.