Table 4.

Logistic regression analyses testing incremental validity for SCID diagnoses of drug use disorders

	SCID DIAGNOSIS
	Drug Abuse (N = 1,172)				Drug Dependence (N = 1,173)				Drug Use Disorder1 (N = 1,173)
STEP 1	Model fit Χ2(2) = 188.29***, R2 = .36				Model fit Χ2(2) = 126.61***, R2 = .30				Model fit Χ2(2) = 290.97***, R2 = .43
	β	S.E.	Odds Ratio	95% CI	β	S.E.	Odds Ratio	95% CI	β	S.E.	Odds Ratio	95% CI
Self-Report	3.55***	.34	34.93	18.04–67.64	3.22***	.37	25.12	12.17–51.85	3.59***	.27	36.35	21.60–61.18
STEP 2	Model fit Χ2(4) = 214.44***, R2 = .41				Model fit Χ2(4) = 130.70***, R2 = .31				Model fit Χ2(4) = 316.83***, R2 = .46
	Χ2change(2) = 26.15***				Χ2change (2) = 4.09***				Χ2change (2) = 25.86***
	β	S.E.	Odds Ratio	95% CI	β	S.E.	Odds Ratio	95% CI	β	S.E.	Odds Ratio	95% CI
Self-Report	2.83***	.37	16.86	8.19–34.70	2.92***	.41	18.47	8.31–41.05	2.99***	.29	19.89	11.30–35.03
Biological Tests
Urine	1.01***	.29	2.73	1.56–4.79	0.07	.31	1.07	0.58–1.96	0.63*	.25	1.88	1.15–3.07
Hair	0.70*	.31	2.01	1.11–3.64	0.60	.33	1.82	0.95–3.48	0.63***	.26	2.37	1.44–3.90
STEP 3	Model fit Χ2(5) = 225.28***, R2 = .42				Model fit Χ2(5) = 163.82***, R2 = .38				Model fit Χ2(5) = 354.65***, R2 = .51
	Χ2change (1) = 10.83***				Χ2change (1) = 33.12***				Χ2change (1) = 37.82***
	β	S.E.	Odds Ratio	95% CI	β	S.E.	Odds Ratio	95% CI	β	S.E.	Odds Ratio	95% CI
Self-Report	1.98***	.45	7.21	3.01–17.30	1.28**	.50	3.59	1.36–9.48	1.62***	.36	5.06	2.50–10.21
Biological Tests
Urine	1.13***	.29	3.10	1.74–5.50	0.28	.33	1.33	0.70–2.52	0.78**	.27	2.18	1.30–3.66
Hair	0.54	.31	1.72	0.94–3.17	0.31	.35	1.36	0.69–2.69	0.63*	.27	1.88	1.10–3.20
DUS Ratings	0.61***	.18	1.84	1.29–2.65	1.13***	.20	3.10	2.11–4.57	1.05***	.17	2.86	2.03–4.03

Notes.

^*p <.05.

^**p < .01.

^***p <.001. R² values are Nagelkerke.

¹SCID diagnosis for at least one of drug abuse or dependence.