Table 4. Models Predicting Days of Use Among Those Reporting Use.

	GSI	Somatization	Depression	Hostility	Phobic Anxiety
Abstinence	B(SE)	B(SE)	B(SE)	B(SE)	B(SE)
BSI Score (GSI, Somatization, etc.)	0.060(0.031)	0.092(0.029)**	0.047(0.025)	0.021(0.034)	0.009(0.033)
Time Point
Baseline (Reference)
6-month	-0.358(0.074)***	-0.358(0.074)***	-0.359(0.074)***	-0.359(0.073)***	-0.358(0.074)***
12-month	-0.305(0.071)***	-0.309(0.072)***	-0.305(0.071)***	-0.309(0.071)***	-0.306(0.071)***
18-month	-0.177(0.059)**	-0.189(0.059)**	-0.177(0.059)**	-0.173(0.059)**	-0.170(0.059)**
Female	-0.007(0.083)	-0.016(0.083)	-0.003(0.083)	0.005(0.083)	0.009(0.083)
White	0.107(0.067)	0.098(0.067)	0.105(0.067)	0.108(0.066)	0.108(0.066)
Age	-0.003(0.003)	-0.004(0.003)	-0.003(0.003)	-0.003(0.003)	-0.003(0.003)
Length of Stay	0.000(0.000)	0.000(0.000)	0.000(0.000)	0.000(0.000)	0.000(0.000)
Inpatient Psychiatric Stay	0.193(0.086)*	0.189(0.086)*	0.200(0.088)*	0.205(0.086)*	0.207(0.086)*
Outpatient Psychiatric Services	-0.255(0.109)*	-0.254(0.109)*	-0.254(0.109)*	-0.243(0.108)*	-0.240(0.111)*
Psychiatric Medication	-0.006(0.067)	-0.001(0.067)	-0.013(0.068)	0.001(0.066)	0.000(0.066)
Wald Test for Joint Effect of Time	χ2=33.3, p<0.001	χ2=33.7, p<0.001	χ2=33.3, p<0.001	χ2=33.9, p<0.001	χ2=33.3, p<0.001

Note. This table displays unstandardized coefficients (B) and standard errors (SE) for variables entered into models predicting days of use during the month of highest use among those reporting use in the past 6 months. Separate models were run to test the relationship between days of use and different BSI scores (GSI and subscale scores for somatization, depression, hostility, and phobic anxiety). All models included interview time point and controlled for gender, race, age, length of stay and services use. Wald tests (χ² with 3 degrees of freedom) were conducted to test the combined effect of time across follow-up interviews.

^*p<0.05;

^**p<0.01

^***p<0.001.