. Author manuscript; available in PMC: 2022 Jul 1.

Published in final edited form as: Addiction. 2020 Dec 29;116(7):1794–1804. doi: 10.1111/add.15344

Table 2.

Descriptive statistics and bivariate correlations of study variables

Variables	Pain Severity	Stress	Negative Mood	Opioid Craving	Illicit Opioid Use

1. Pain Severity	–	.05^**	.04^*	.04^**	.03^*
2. Stress		–	.35^**	.07^**	.04^**
3. Negative Mood			–	.06^**	.05^**
4. Opioid Craving				–	.06^**
5. Illicit Opioid Use					–

Mean	1.13	1.56	1.21	1.34	0.05
SD	2.39	0.91	.37	0.72	0.22
Observed Range	0–10	1–5	1–4.75	1–5	0–1
ICC_level-3	.62	.41	.52	.44	.19
ICC_level-2	.19	.14	.22	.15	.15

Note. All the level-1 variables were day-mean centered so that the bivariate correlations indicate pure level-1 associations.

p < .05

^**

p < .01