Table 3.

Correlations between cocaine-related LPPs and drug use variables

	CUD+ (N=28)		CUD− (N=27)		CUD Combined (N=55)
	Early LPP	Late LPP	Early LPP	Late LPP	Early LPP	Late LPP
Age at onset of cocaine use (years)	−.21	−.06	.14	.03	−.04	−.10
Duration of use (years)	.32	−.08	.18	.29	.28*	.17
Frequency of use (days/week) last 30 days	.23	.10	−.10	−.15	.09	−.02
Current use in $ per use, last 30 days	.16	.68**	.09	−.05	.11	.30
Duration of current abstinence (days)	−.17	−.09	.02	.15	−.05	.14
Length of longest abstinence (days)	.13	.15	.19	.30	.18	.24
Total score on the Cocaine Selective Severity Assessment Scale	−.23	.03	−.45*	−.42*	−.32*	−.22
Severity of Dependence Scale	−.24	−.12	.27	.15	.04	.09
Cocaine Craving Questionnaire	.14	.23	−.25	−.19	−.05	−.05

Note.

^*p < .05;

^**p < .01.

All values are Spearman correlation coefficients, reflecting the relationships between cocaine-related early and late LPP amplitudes and the respective cocaine use variables.