Table 2.

Comparison of CP and SP groups on pain location, pain genesis, and pain-related substance use^a

	CP (n = 88) %	SP (n = 87) %	χ2	P	AOR (95% CI)	P
Pain location			35.6	<0.001
Back	84	72			2.3 (0.9–5.3)	0.06
Shoulder	33	20			2.9 (1.3–6.6)	0.01
Pelvis	10	2			6.7 (1.1–39.9)	0.04
Hands	9	3			4.3 (0.8–22.8)	0.08
Feet	13	12			1.3 (0.4–4.2)	0.71
Stomach	16	31			0.4 (0.1–0.9)	0.03
Head	19	23			1.0 (0.4–2.6)	0.95
Face	2	3			0.9 (0.1–9.5)	0.93
Legs	48	47			1.4 (0.7–2.8)	0.42
Arms	6	15			0.1 (0.03–0.5)	0.005
Other	25	18			1.7 (0.7–3.9)	0.21
	CP (n = 88) %	SP (n = 87) %	χ2	P	AOR (95% CI)	P
Pain genesis			48.2	<0.001
Accident	57	25			6.2 (2.1–18.1)	0.001
Surgery	11	6			1.8 (0.4–8.4)	0.45
Nerve damage	21	2			15.7 (2.9–84.5)	0.001
Arthritis	11	1			5.9 (0.5–67.3)	0.15
HIV	0	0			--	--
Cancer	0	0			--	--
Don’t know	21	23			2.8 (0.8–9.5)	0.10
Other	19	46			0.7 (0.2–2.2)	0.58
Pain-related Substance Use in Past Week			17.1	0.10
More than prescribed opiate medication	33	18			1.5 (0.6–3.4)	0.35
Somebody else’s opiate pain medication	61	45			1.6 (0.8–3.3)	0.19
Heroin	39	33	1.1 (0.5–2.2)	0.88
	CP (n = 88) %	SP (n = 87) %	χ2	P	AOR (95% CI)	P
Street methadone	15	9			1.1 (0.4–3.2)	0.89
More than prescribed non-opiate medication	11	3			2.0 (0.4–9.7)	0.38
Somebody else’s non-opiate medication	13	7			0.9 (0.3–3.6)	0.95
More than prescribed benzodiazepine medication	11	5			1.5 (0.3–7.0)	0.59
Somebody else’s benzodiazepine medication	14	5			1.6 (0.3–7.3)	0.55
Other street drugs	36	24			1.5 (0.6–3.5)	0.34
Alcohol	24	25			0.5 (0.2–1.2)	0.13

CP = Chronic pain, SP = Some pain, AOR = Adjusted odds ratio.

^aControlling for age.