TABLE 2.

Marijuana use and any past 30 day other substance use among undergraduates

Frequency of marijuana use in past 30 days	None (1,034) (n) %	1–2 days (138) (n) %	3–9 days (96) (n) %	>10 days (89) (n) %
Cigarettes	(123) 11.9%	(85) 61.2%	(74) 77.9%	(75) 83.3%
OR 95%CI	1.0 (reference group)	4.6 3.2–6.6	10.3 6.2–16.9	15.6 8.7–27.9
Adjusted OR 95%CI	–	4.6 3.2–6.7	9.8 5.9–16.4	14.7 8.1–26.6
Alcohol	(745) 72.1%	(138) 100.0%	(96) 100.0%	(88) 98.9%
OR 95%CI	1.0 (reference group)	–	–	21.7 3.0–156.5
Adjusted OR 95%CI	–	–	–	16.8 2.3–123.0
Cocaine	(1) .1%	(24) 17.3%	(29) 30.2%	(42) 46.7%
OR 95%CI	1.0 (reference group)	6.7 3.9–11.4	13.9 8.2–23.6	28.7 17.2–48.0
Adjusted OR 95%CI	–	6.9 4.0–11.9	13.7 7.8–23.9	25.8 15.0–44.2
Amphetamines	(9) .9%	(15) 10.9%	(15) 15.6%	(27) 30.3%
OR 95%CI	1.0 (reference group)	5.9 2.4–14.1	6.4 2.4–16.9	8.2 3.3–20.7
Adjusted OR 95%CI	–	5.7 2.3–14.0	5.6 2.0–15.4	7.6 2.9–20.2
Hookah	(210) 20.3%	(102) 73.4%	(79) 83.2%	(83) 92.2%
OR 95%CI	1.0 (reference group)	4.9 3.2–7.2	8.7 5.0–15.0	24.4 10.6–56.2
Adjusted OR 95%CI	–	4.8 3.2–7.1	8.4 4.8–14.6	22.3 9.6–51.8

p-values <.05 are in bold.