Table 5.
Adjusted Relative Risk Ratios from Multivariable Multinomial Logistic Regressions of Latent Marijuana Class Membership on Covariates: Moderate versus Heavy Use within Classes of the Same Use Duration Pattern
| Early Young Adult | Young Adult | Persistent | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Moderate Users | Heavy Users | Moderate Users | Heavy Users | Moderate Users | Heavy Users | ||||
| [Base Class] | ARR | p | [Base Class] | ARR | p | [Base Class] | ARR | p | |
| Gender (referent=female) | |||||||||
| Male | 1.87 | <0.001 | 3.10 | <0.001 | 1.52 | 0.014 | |||
| Race/ethnicity (referent=White) | |||||||||
| Black | 0.92 | 0.816 | 0.97 | 0.925 | 0.96 | 0.904 | |||
| Hispanic | 0.74 | 0.540 | 1.40 | 0.539 | 1.06 | 0.940 | |||
| Other | 0.56 | 0.167 | 0.97 | 0.934 | 1.16 | 0.702 | |||
| Parental education (referent=no college) | |||||||||
| Some college | 1.60 | 0.001 | 1.45 | 0.014 | 1.42 | 0.036 | |||
| Religious commitment at age 18 (referent=high) | |||||||||
| Medium | 1.57 | 0.012 | 1.75 | 0.004 | 1.46 | 0.086 | |||
| Low | 1.55 | 0.013 | 2.09 | <0.001 | 1.75 | 0.006 | |||
| Binge drinking at age 18 (referent=none) | |||||||||
| Any | 1.47 | 0.009 | 2.58 | <0.001 | 0.93 | 0.699 | |||
| Cigarette smoking at age 18 (referent=none) | |||||||||
| Any | 2.10 | <0.001 | 2.49 | <0.001 | 1.08 | 0.668 | |||
| Ever married between ages 19/20 to 29/30 (referent=no) | |||||||||
| Yes | 0.57 | <0.001 | 1.05 | 0.749 | 1.01 | 0.971 | |||
| Ever graduate from college between ages 19/20 to 29/30 (referent=no) | |||||||||
| Yes | 0.65 | 0.004 | 0.61 | 0.005 | 0.73 | 0.090 | |||
| Income from welfare/unemployment between ages 35 to 45 (referent=none) | |||||||||
| Any | 0.70 | 0.082 | 1.51 | 0.022 | 0.93 | 0.663 | |||
| Alcohol use from ages 35 to 45 (past 30 days) | |||||||||
| Average frequency | 1.00 | 0.970 | 1.06 | 0.125 | 1.03 | 0.353 | |||
| Cigarette use from ages 35 to 45 (past 30 days) | |||||||||
| Average frequency | 1.00 | 0.694 | 1.01 | 0.484 | 1.04 | <0.001 | |||
Notes: N (unweighted) = 9,831. ARR = Adjusted relative risk ratio; obtained from models simultaneously controlling for past 12-month marijuana use latent class membership as well as gender, race/ethnicity, parental education, religious commitment, age 18 binge drinking and cigarette use, marriage, college graduation, ages 35-45 income from welfare/unemployment, ages 35-45 cigarette use frequency, ages 35-45 alcohol use frequency, and cohort. Missing data on covariates were addressed by imputing means (for continuous measures) together with the use of missing data indicators (results for missing indicators not shown). Bold font indicates significant (p<.01) estimates. ARRs from classes other than specified heavy users not shown.