Table 3.

Correlation coefficients for the relationship between indices of demand and measures of pain and drug use disorder.

	Opioid demand				Cannabis demand
	Q0		α		Q0		α
	Alone	Cannabis US$10	Alone	Cannabis US$10	Alone	Opioid US$1	Alone	Opioid US$1
Brief Pain Index: Severity scale (range: 0–10)	.22*	ns	−.29**	ns	ns	.27**	ns	ns
Brief Pain Index: Interference scale (range: 0–10)	.23*	ns	ns	ns	ns	ns	ns	ns
Number of days experienced pain in last 30	−.23*	−.29**	ns	ns	ns	−.21*	ns	ns
Opioid use disorder symptoms (range: 0–11)	.31**	.28**	−.26*	ns	ns	ns	ns	ns
Cannabis use disorder symptoms (range: 0–11)	.28**	ns	−.23*	ns	ns	.28**	ns	−.22*
Number of days of opioid use in last 30	ns	ns	ns	ns	ns	ns	ns	ns
Number of days of cannabis use in last 30	ns	ns	ns	ns	ns	ns	ns	ns

^*p < .05.

^**p < .01.

ns: nonsignificant; Q₀: demand intensity; α: demand elasticity.