Table 2.

Pairwise polychoric phenotypic correlations (and standard errors) between lifetime non-medical use of over-the-counter or prescription analgesics (NMUA) and measures of (a) substance use and (b) substance use disorders. Males are below the diagonal.

	(a) Correlations with lifetime substance use				(b) Correlations with substance use disorders
	1.	2.	3.	4.		1.	2.	3.	4.
1. Cannabis use	1	0.74(0.04)	0.42(0.07)	0.10(0.05)	1. CUD	1	0.44(0.04)	0.50(0.05)	0.11(0.00)
2. Nicotine use	0.78(0.03)	1	0.43(0.07)	0.15(0.05)	2. FTND	0.43(0.05)	1	0.72(0.04)	0.22(0.00)
3. Opioid use	0.60(0.08)	0.39(0.08)	1	0.60(0.06)	3. AUD	0.46(0.05)	0.70(0.04)	1	0.24(0.00)
4. NMUA	0.26(0.06)	0.29(0.06)	0.67(0.06)	1	4. NMUA	0.15(0.00)	0.24(0.00)	0.32(0.00)	1

Notes: CUD = DSM-V cannabis use disorder, FTND = Fagerström Test for Nicotine Dependence, AUD = DSM-V alcohol use disorder (AUD). Substance use disorders based on the period when subjects reported using the most. All non-users coded as missing.