Table 4.

Three substance use classes: class prevalences and risk level probabilities

Indicator	Risk level	Class 1 (n = 44; 8.6%)	Class 2 (n = 90; 17.6%)	Class 3 (n = 378; 73.8%)
Tobacco	Low	0.075	0.030	0.220
	Moderate	0.411	0.838	0.668
	High	0.514	0.132	0.112
Alcohol	Low	0.447	0.494	0.569
	Moderate	0.176	0.415	0.298
	High	0.377	0.091	0.133
Cannabis	Low	0.400	0.134	0.427
	Moderate	0.167	0.757	0.475
	High	0.433	0.108	0.098
Cocaine	Low	0.290	0.155	0.522
	Moderate	0.097	0.700	0.364
	High	0.613	0.146	0.113
Methamphetamine	Low	0.771	0.452	0.901
	Moderate	0.025	0.441	0.095
	High	0.204	0.107	0.004
Prescription stimulants	Low	0.850	0.778	0.980
	Moderate	0.036	0.222	0.020
	High	0.114	0.000	0.000
Hallucinogens	Low	0.829	0.619	0.984
	Moderate	0.080	0.381	0.013
	High	0.091	0.000	0.003
Inhalants	Low	0.843	0.578	0.974
	Moderate	0.066	0.422	0.026
	High	0.091	0.000	0.000
Prescription opioids	Low	0.553	0.494	0.940
	Moderate	0.197	0.506	0.052
	High	0.250	0.000	0.008
Street opioids	Low	0.502	0.441	0.999
	Moderate	0.085	0.506	0.001
	High	0.412	0.054	0.000
Sedatives	Low	0.675	0.524	0.959
	Moderate	0.032	0.476	0.036
	High	0.294	0.000	0.005
Other drugs	Low	0.909	0.954	0.990
	Moderate	0.000	0.046	0.008
	High	0.091	0.000	0.003
History of medication for opioid use disorder	No	0.277	0.580	0.954
	Yes	0.723	0.420	0.046
History of injection drug use	Never	0.389	0.432	0.916
	Past only	0.308	0.351	0.052
	Recent	0.303	0.218	0.032

The indicator level with the highest probability within each latent class is shown in bold font