Table 5.

Prevalence of Perceived Substance Use Availability as A Function of Survey Wave, Social Distancing, and Controls.

	Marijuana Availabilitya		Alcohol Availabilityb		Vaping Device Availabilitya
	Model 1	Model 2	Model 1	Model 2	Model 1	Model 2
Second survey wave	0.50**	0.48**	0.26**	0.24**	0.55**	0.56*
	(0.35−0.71)	(0.34−0.69)	(0.13−0.50)	(0.12−0.50)	(0.33−0.92)	(0.33−0.94)
Social Distancing	0.61**	0.59**	0.58**	0.65**	0.44**	0.48**
Practicesc	(0.46−0.83)	(0.42−0.81)	(0.42−0.78)	(0.47−0.90)	(0.33−0.59)	(0.35−0.65)
Female		1.12		1.28		1.06
		(0.67–1.87)		(0.75–2.16)		(0.65–1.74)
White		1.17		1.61		1.51
		(0.62–2.18)		(0.88–2.93)		(0.85–2.67)
Grade point average		1.19*		0.89		0.94
		(1.01–1.41)		(0.76–1.04)		(0.81–1.10)
Parent has college		1.03		1.02		1.38
education		(0.59–1.80)		(0.53–1.96)		(0.77–2.46)
Constant	3.98**	2.05	8.82**	9.14**	5.20**	4.09**
	(2.44–6.49)	(0.72–5.82)	(4.59–16.94)	(3.16–26.40)	(2.99–9.05)	(1.61–10.35)

^aQuestion asked of a randomly-selected one-third of sample at baseline and of all respondents at follow up.

^bQuestion asked of a randomly-selected one-sixth of sample at baseline and of all respondents at follow up.

^cCoded 0 for none to medium, 1 for high, and 2 for extreme.