Table 2.

Unadjusted associations between automated and interview data and most likely patient class

	Most Likely Latent Class				Data Source
	Typical (n = 580)	Addictive Behaviors (n=82)	Pain Dysfunction (n=42)	p-value omnibus test	Automated	Interview
Male	35%	51%	45%	0.014	x
Age mean (s.d.)	55.9 (10.6)	52.24 (10.6)	53.8 (10.3)	0.010	x
Education, more than high school	75%	68%	78%	0.338		x
Married or living as married	67%	70%	76%	0.410		x
Caucasian	90%	90%	95%	0.581		x
Employement Status				0.052*		x
Employed	42%	41%	17%
Unemployed	3%	1%	2%
Not in paid work force	29%	27%	37%
Unable to work	23%	31%	41%
Other	3%	0%	2%
Current Smoker	24%	32%	32%	0.160	x
Opioid problems diagnosed past 3 yrs	3%	10%	10%	0.002	x
Non-opioid drug problems diagnosed past 3 yrs	6%	11%	19%	0.003	x
Alcohol potential problem	6%	11%	2%	0.150		x
Sedative potential problem	4%	12%	10%	0.004		x
Marijuana potential problem	8%	11%	5%	0.472		x
Heroin, cocaine and/or methamphetamine potential problem	3%	6%	2%	0.248		x
Benzodiazepines any prescribed past year	32%	46%	40%	0.026	x
Anxiety visit past year	16%	23%	29%	0.039	x
Mood disorder visit past year	27%	41%	26%	0.020	x
Inpatient stay any past year	14%	22%	19%	0.131	x
Ugent care/E.R. visit any past year	18%	24%	33%	0.021	x
Years since first chronic pain >10	56%	44%	56%	0.150		x
Believe opiates work best for pain	54%	63%	76%	0.009		x
Believe more pain relief possible w/ opiates	35%	32%	40%	0.653		x
Avg. prescribed daily opioid dose in mg past year mean (s.d.)	43.0 (84.2)	131.9 (195.6)	127.8 (129.6)	<0.001	x
Opioid type used during past year				<0.001*	x
Schedule III only	31%	15%	10%
Schedule II- any short acting no long acting	37%	22%	19%
Schedule II- any long acting	32%	63%	71%

^*df=8

^**df=4