Table 2.

Factor Loadings

Item	Threshold	gSUd	Alc	Can	Stim	Sed	Op
Alcohol Items
Alc. Tolerance	−0.35	0.54	0.74
Alc. Interfered	0.36	0.57	0.78
Alc. Desire	1.00	0.53	0.73
Alc. Withdrawal	0.82	0.62	0.85
Alc. Failed to Cut	1.10	0.55	0.75
Cannabis Items
Can. Tolerance	0.32	0.81		0.91
Can. Time	0.42	0.83		0.94
Can. Interfered	0.92	0.61		0.72
Can. Desire	0.93	0.70		0.81
Can. Withdrawal	0.97	0.73		0.85
Can. Failed to Cut	1.33	0.57		0.68
Stimulant Items
Stim. Tolerance	1.11	0.85			0.92
Stim. Time	1.30	0.91			0.96
Stim. Interfered	1.51	0.87			0.92
Stim. Desire	1.34	0.90			0.94
Stim. Withdrawal	1.15	0.93			0.98
Stim. Failed to Cut	1.61	0.88			0.94
Sedative Items
Sed. Tolerance	1.45	0.84				0.93
Sed. Time	1.71	0.84				0.92
Sed. Interfered	1.68	0.83				0.92
Sed. Desire	1.80	0.81				0.89
Sed. Withdrawal	1.53	0.86				0.96
Sed. Failed to Cut	1.97	0.79				0.88
Opiate Items
Op. Tolerance	1.24	0.92					0.97
Op. Time	1.46	0.95					0.97
Op. Interfere	1.60	0.89					0.94
Op. Desire	1.49	0.94					0.97
Op. Withdrawal	1.35	0.95					0.98
Op. Failed to Cut	1.73	0.92					0.96
Co-use Items
Alc + Can	0.26	0.82	0.19	0.79
Alc + Stim	1.32	0.49	0.23		0.38
Alc + Sed	0.97	0.75	0.24			0.69
Alc + Op	0.89	0.70	0.37				0.52
Can + Stim	0.86	0.75		0.46	0.43
Can + Sed	1.25	0.68		0.31		0.51
Can + Op	1.10	0.70		0.37			0.47
Stim + Sed	1.74	0.63			0.45	0.28
Stim + Op	1.68	0.74			0.39		0.48
Sed + Op	1.70	0.69				0.28	0.50

All loadings are significant at p<.001. Alc = Alcohol, Can = Cannabis, Stim = Stimulants, Sed = Sedatives, Op = Opiates, Time = Great deal of time spent using [substance], obtaining [substance], or getting over effects, Interfered = Interfered with responsibilities, Desire = Strong desire for substance, Failed to Cut = Failed to cut down on [substance] 3 or more times.