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. Author manuscript; available in PMC: 2008 Sep 6.
Published in final edited form as: Drug Alcohol Depend. 2007 Apr 18;90(1):72–80. doi: 10.1016/j.drugalcdep.2007.02.024

Table 3.

Odds ratios of logistic regression for simultaneous and concurrent marijuana and other drug use with alcohol among current drinkers

Concurrent Use Simultaneous Use

Marijuana and Alcohol Other Drugs1 and Alcohol Marijuana and Alcohol Other Drugs1 and Alcohol
Male 1.05 (0.70, 1.58) 0.91 (0.57, 1.45) 0.87 (0.64, 1.19) 1.00 (0.52, 1.89)
Age (vs 50+)
 18–29 5.05 (2.38, 10.74) 1.31 (0.75, 2.28) 5.85 (2.72, 12.58) 2.85 (0.84, 9.64)
 30–49 2.04 (0.97, 4.29) 0.68 (0.39, 1.16) 4.63 (2.19, 9.81) 1.69 (0.46, 6.21)
Ethnicity (vs White)
 African-American 0.86 (0.50, 1.48) 1.09 (0.55, 2.12) 1.49 (0.97, 2.26) 1.14 (0.41, 3.16)
 Hispanic 1.32 (0.80, 2.16) 0.62 ((0.34,1.12) 0.81 (0.51, 1.28) 0.64 (0.29, 1.41)
 Other 0.56 (0.22, 1.45) 1.13 (0.50, 2.55) 2.54 (1.44, 4.48) 1.84 (0.61, 5.60)
Education (vs high school graduate)
 <High school 0.76 (0.39, 1.51) 1.81 (0.97, 3.37) 2.32 (1.48, 3.64) 1.27 (0.60, 2.69)
Income (vs >=$30,000)
 <$30,000 1.30 (0.83, 2.03) 1.39 (0.89, 2.16) 1.34 (0.96, 1.86) 1.25 (0.69, 2.27)
Relationship Status (vs Partnered)
 Not partnered 1.74 (1.12, 2.71) 1.23 (0.79, 1.91) 1.75 (1.28, 2.38) 1.32 (0.73, 2.38)
5 or more drinks in a day (vs never)
 Yearly 1.78 (1.11, 2.86) 1.36 (0.77, 2.40) 3.99 (2.61, 6.08) 2.77 (1.09, 7.00)
 Monthly 1.10 (0.65, 1.86) 1.85 (1.04, 3.28) 8.64 (5.83, 12.79) 14.17 (6.37, 31.51)

F-statistics 6.67 2.92 24.07 13.80
DF 11, 4125 11, 4114 11, 4125 11, 4114
Prob > F 0.0000 0.0008 0.0000 0.0000
1

Notes: Marijuana not included.

Bolded odds ratios statistically significant at p<.05.

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