Table 2.
Estimated Means for Four-Profile Latent Model and Profile Comparisons
| Sample | Light Users (LU; 49.0%) | Moderate Drinkers with Frequent Marijuana Use (MDFM; 37.9%) | Moderate Drinkers with High Peak Levels (MDHP; 5.4%) | Heavy/Frequent Users (HFU; 7.7%) | ||
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| Latent Profile Indicator | M (SE) | M (SE) | M (SE) | M (SE) | M (SE) | |
| Drinks per day (0–13 drinks) | 2.22 (2.78) | 1.80 (0.07) | 1.89 (0.09) | 2.71 (0.29) | 6.22 (0.57) | |
| Drinking days per week (0–7 days) | 4.26 (3.52) | 3.75 (0.11) | 4.36 (0.14) | 4.96 (0.37) | 6.54 (0.17) | |
| Binge drinking days per week (0–7 days) | 1.52 (2.29) | 1.24 (0.08) | 1.21 (0.09) | 1.68 (0.21) | 4.79 (0.45) | |
| Maximum number of drinks (1–30 drinks) | 7.54 (23.99) | 7.00 (0.24) | 6.78 (0.29) | 10.67 (1.92) | 12.56 (1.24) | |
| Joints per day (0–12 joints) | 1.48 (2.86) | 0.39 (0.02) | 2.13 (0.10) | 3.36 (0.70) | 3.94 (0.42) | |
| Marijuana use days per week (0–7 days) | 4.43 (6.60) | 2.00 (0.08) | 6.81 (0.04) | 6.56 (0.21) | 6.72 (0.15) | |
| Maximum number of joints (0–30 joints) | 5.18 (38.68) | 2.17 (0.11) | 5.39 (0.28) | 26.73 (1.30) | 8.04 (1.02) | |
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| Profile Comparisons | Overall Test (χ2) | Sample | LU | MDFM | MDHP | HFU |
| Demographics | % | % | % | % | % | |
| Sex (% female) | 5.55 | 50.7 | 48.8 | 54.5 | 60.8 | 36.9 |
| Race/ethnicity (% non-Hispanic white) | 0.08 | 59.6 | 59.0 | 60.2 | 60.7 | 58.9 |
| College status (% enrolled in/graduated)a | 10.24* | 76.2 | 81.7 | 68.5 | 75.0 | 79.9 |
| Greek affiliation (% Greek)b,d | 12.89** | 26.4 | 27.6 | 19.8 | 29.6 | 51.2 |
| M (SE) | M (SE) | M (SE) | M (SE) | M (SE) | ||
| Age (years) | 4.48 | 23.0 (0.08) | 22.9 (0.12) | 22.9 (0.14) | 23.0 (0.33) | 23.5 (0.28) |
| Substance Use Behavior | % | % | % | % | % | |
| Tobacco use (% yes) | 7.59 | 58.8 | 55.1 | 60.8 | 53.5 | 75.6 |
| Other drug use, besides tobacco/marijuana (% yes)a,b,d | 24.20*** | 62.3 | 54.1 | 68.2 | 64.2 | 85.3 |
| Most frequent route of marijuana administration | % | % | % | % | % | |
| Rolling papers/joints (% most frequent)a,e | 12.56** | 39.9 | 45.0 | 31.3 | 57.3 | 37.7 |
| Hand pipes (% most frequent) | 0.18 | 23.8 | 23.4 | 24.4 | 21.4 | 25.0 |
| Water pipes (% most frequent)a,e | 14.25** | 16.7 | 11.3 | 25.1 | 10.7 | 14.7 |
| Vaporization (% most frequent)b,d | 9.42* | 10.6 | 11.7 | 10.7 | 10.7 | 2.2 |
| Edibles (% most frequent)c,e | 23.10* | 4.2 | 5.5 | 3.0 | 0.0 | 5.1 |
| Hookah (% most frequent)c,e,f | 19.10*** | 3.5 | 3.1 | 2.5 | 0.0 | 12.9 |
| Other (% most frequent) | 7.21 | 1.3 | 0.0 | 3.1 | 0.0 | 2.5 |
Notes.
a
Significant (p < 0.05) difference between LU and MDFM
b
Significant difference between LU and HFU
c
Significant difference between LU and MDHP
d
Significant difference between MDFM and HFU
e
Significant difference between MDFM and MDHP
f
Significant difference between MDHP and HFU. Other drug use includes use of opiates, barbiturates, club drugs, tranquilizers, cocaine, crack, amphetamines, steroids, inhalants, psychedelics, or other prescription drugs used nonmedically.
*
p < .05.
**
p < .01.
***
p < .001.