. Author manuscript; available in PMC: 2018 Jan 1.

Published in final edited form as: J Child Adolesc Subst Abuse. 2016 Aug 24;26(1):60–65. doi: 10.1080/1067828X.2016.1210550

Table 2.

Odds ratios for past 30-day substance use by grade and rurality status.

Substance	6^th Grade		7^th Grade		8^th Grade		9^th Grade		10^th Grade		11^th Grade		12^th Grade

	OR	P-Value	OR	P-Value	OR	P-Value	OR	P-Value	OR	P-Value	OR	P-Value	OR	P-Value
Alcohol	1.32	<.001	1.32	<.001	1.24	<.001	1.22	<.001	1.17	<.001	1.10	.001	0.82	<.001
Smoking Tobacco	1.55	<.001	1.74	<.001	1.69	<.001	1.44	<.001	1.42	<.001	1.35	<.001	1.01	.754
Chewing Tobacco	1.94	<.001	2.27	<.001	2.08	<.001	1.90	<.001	1.84	<.001	1.60	<.001	1.33	<.001
Marijuana	1.14	.125	0.99	.872	1.02	.704	0.89	<.001	0.93	.03	0.87	<.001	0.65	<.001
Cocaine	1.10	.45	0.93	.51	0.93	.413	0.78	.001	0.77	<.001	0.80	.001	0.63	<.001
Inhalants	1.01	.89	1.05	.586	0.94	.390	0.89	.100	0.83	.012	0.80	.002	0.65	<.001
Steroids	1.16	.141	0.94	.547	1.01	.944	0.88	.089	0.78	.002	0.83	.012	0.75	<.001
Ecstasy	1.05	.742	0.86	.225	0.90	.260	0.76	<.001	0.78	.001	0.68	<.001	0.56	<.001
Methamphetamines	0.97	.778	0.84	.158	0.84	.104	0.86	.056	0.83	.02	0.79	.004	0.63	<.001
Hallucinogens	1.00	.983	0.85	.214	0.84	.107	0.75	<.001	0.74	<.001	0.68	<.001	0.51	<.001
Prescription Drugs	1.05	.529	1.17	.016	0.99	.921	0.95	.28	0.95	.268	0.92	.082	0.71	<.001