. Author manuscript; available in PMC: 2023 Dec 1.

Published in final edited form as: J Subst Abuse Treat. 2022 Sep 30;143:108894. doi: 10.1016/j.jsat.2022.108894

Table 4.

Rates of past year cocaine, methamphetamine and heroin use by prescription substance use categories – United States, 2015–2020.

Characteristic	Weighted % (95 % CI)
	No use	Past year prescription stimulants		Past year prescription opioids
	No use	Prescribed use	Misuse	Prescribed use	Misuse

Cocaine use	1.1 (1.0–1.2)	3.4 (3.1–3.8)^a,c	12.0 (11.0–12.9)^a,d	2.1 (1.9–2.2)^a	5.7 (5.1–6.3)^a
Methamphetamine use	0.4 (0.4–0.5)	1.2 (1.0–1.4)^a,c	2.4 (1.9–3.0)^a	0.5 (0.4–0.6)	2.1 (1.8–2.5)^a
Heroin use	0.1 (0.1–0.1)	0.4 (0.3–0.5)^b,c	0.6 (0.4–0.7)^a,d	0.2 (0.2–0.3)^a	2.1 (1.7–2.5)^a

Each row represents a unique multivariable logistic regression model estimating a rates of use for the given substance (left column), controlling for past year stimulant use or misuse and past year prescription opioid use or misuse. Adjusted proportions were calculated using post-estimation predictive margins.

Different than no use p < 0.001.

Different than no use p < 0.01.

Different than prescription opioid use p < 0.001.

Different than prescription opioid misuse p < 0.001.