Table 3.

Hierarchical multiple regression: Pain-related OUD Exacerbation Scale.

	R	R 2	Adj. R2	ΔR2	ΔF	P
Model 1	0.123	0.015	0.006	0.015	1.76	0.188
Model 2	0.194	0.038	0.021	0.023	2.68	0.104
Model 3	0.250	0.063	0.012	0.025	0.733	0.571
Model 4	0.338	0.114	0.057	0.052	6.35	0.013
Model 5	0.472	0.223	0.133	0.109	2.91	0.017
Model 6	0.509	0.259	0.166	0.036	5.03	0.027

Model 1: gender.

Model 2: gender and race.

Model 3: gender, race, opioid use disorder (OUD) severity, and types of opioids used (heroin, illicitly manufactured fentanyl, or prescription opioids).

Model 4: gender, race, OUD severity, types of opioids used, and Mental Health (Research and Development-36 [RAND-36]).

Model 5: gender, race, OUD severity, types of opioids used, Mental Health (RAND-36), and Pain Severity (RAND-36).

Model 6: gender, race, OUD severity, types of opioids used, Mental Health (RAND-36), Pain Severity (RAND-36), and fibromyalgia.