Table 5.

Associations between ERP outcome variables and alcohol-use and clinical characteristics in TNAD (N = 45)

	ERP components
	P3a		P3b
	Latency	Amplitude	Latency	Amplitude
Individual alcohol-use variables
Drinking onset age (years)	−.079	−.012	.049	−.006
Alcohol lifetime dose (units)	.262	.190	−.028	−.150
Age of first intoxication (years)	−.129	−.029	.093	−.133
Age of onset of regular drinking (years)	−.102	−.008	.100	−.157
Regular drinking duration (months)	.278	.072	−.060	−.114
Regular drinking frequency (days/month)	.283	.012	.112	−.330^*
Regular drinking average monthly quantity (units/month)	.089	.140	−.031	−.232
Family history density of alcohol problems^a	.036	−.105	.050	.005
Clinical variables
Internalizing composite^b	.447^**	−.046	.117	−.196
Externalizing composite^c	.027	.099	−.207	−.072
ADHD symptom counts	−.190	.268	−.298	.059

Note. Data presented are Spearman correlations.

Number of first-degree cohabiting relatives who are problem drinkers. Note that these are presented as absolute numbers and not proportions (as in previous publications by our group), and so cannot be compared directly with our previously published results on family history drinking scores.

Total symptoms of depressive and anxiety disorders.

Total symptoms of conduct disorder and oppositional defiant disorder.

p < .05.

^**

p < .01