Table 1.
Bivariate analyses comparing adolescents who used medical marijuana to those who did not
| Variable | Used Medical Marijuana n = 122 % (n) or mean (SD) | Did Not Use Medical Marijuana n = 42 % (n) or mean (SD) | Statistic | p value |
|---|---|---|---|---|
|
| ||||
| Gender | ||||
| Female | 19.7 (24) | 35.7 (15) | ||
| Male | 80.3 (98) | 64.3 (27) | χ12 = 4.44 | 0.035 |
|
| ||||
| Race/Ethnicitya | ||||
| Non-Hispanic White | 55.7 (68) | 42.9 (18) | ||
| Hispanic, any race | 32.0 (39) | 26.2 (11) | χ22 = 7.70 | 0.021 |
| American Indian/Alaska Native | 0.8 (1) | 0 | ||
| White | 4.9 (6) | 7.1 (3) | ||
| More than one race | 14.8 (18) | 9.5 (4) | ||
| Unknown/other | 11.5 (14) | 9.5 (4) | ||
| Non-Hispanic, non-White | 12.3 (15) | 31.0 (13) | ||
| American Indian/Alaska Native | 1.6 (2) | 7.1 (3) | ||
| Asian | 0.8 (1) | 0 | ||
| Native Hawaiian or Other Pacific Islander | 0 | 2.4 (1) | ||
| Black or African American | 5.7 (7) | 7.1 (3) | ||
| More than one race | 3.3 (4) | 11.9 (5) | ||
| Unknown/other | 0.8 (1) | 2.4 (1) | ||
|
| ||||
| Age | 16.05 (1.11) | 16.19 (1.15) | t162 = 0.70 | 0.483 |
|
| ||||
| Onset age of first marijuana use | 12.42 (2.03) | 12.93 (1.75) | t162 = 1.46 | 0.147 |
|
| ||||
| Onset age of regular marijuana use | 13.38 (1.84) n = 120 |
14.03 (1.68) n = 38 |
t156 = 1.94 | 0.055 |
|
| ||||
| Number of days used marijuana in the past 6 months | 102.72 (62.16) | 81.55 (61.00) | U = 2037.00 | 0.047 |
|
| ||||
| Number of marijuana abuse and dependence symptoms | 5.52 (2.97) | 3.29 (2.75) | t162 = −4.29 | 0.0005 |
|
| ||||
| Marijuana abuse or dependence diagnosis | ||||
| Yes | 89.3 (109) | 66.7% (28) | ||
| No | 10.7 (13) | 33.3% (14) | χ12 = 11.68 | 0.001 |
|
| ||||
| Number of substance use disorders, no tobacco | 2.50 (1.78) | 2.02 (1.88) | U = 2061.00 | 0.051 |
|
| ||||
| Number of conduct disorder symptoms | 5.30 (2.89) | 4.14 (2.83) | t162 = −2.24 | 0.026 |
|
| ||||
| Conduct disorder diagnosis | ||||
| Yes | 78.7 (96) | 66.7% (28) | ||
| No | 21.3 (26) | 33.3% (14) | χ12 = 2.45 | 0.118 |
|
| ||||
| Perceived riskiness of occasional marijuana use | ||||
| Riskb | 47.9 (57) | 50.0% (21) | ||
| Great risk | 4.2 (5) | 4.8% (2) | ||
| Moderate risk | 10.9 (13) | 26.2% (11) | χ12 = 0.06 | 0.815 |
| Slight risk | 32.8 (39) | 19.0% (8) | ||
| No risk | 52.1 (62) n = 119 |
50.0 (21) | ||
|
| ||||
| Perceived riskiness of regular marijuana use | ||||
| Riskb | 66.1 (78) | 64.3 (27) | ||
| Great risk | 9.3 (11) | 16.7 (7) | ||
| Moderate risk | 26.3 (31) | 26.2 (11) | χ12 = 0.05 | 0.831 |
| Slight risk | 30.5 (36) | 21.4 (9) | ||
| No risk | 33.9 (40) n = 118 |
35.7 (15) | ||
|
| ||||
| FES, familial cohesion | 14.14 (2.90) n = 119 |
14.01 (3.40) n = 41 |
t158 = −0.24 | 0.811 |
|
| ||||
| FES, expressiveness | 12.46 (2.70) n = 120 |
12.37 (2.71) n = 41 |
t159 = −0.18 | 0.854 |
|
| ||||
| FES, conflict | 10.57 (3.07) n = 119 |
10.54 (3.83) n = 41 |
t58.73 = −0.04 | 0.965 |
|
| ||||
| FES, achievement orientation | 13.63 (2.99) n = 119 |
14.38 (3.22) n = 40 |
t157 = 1.34 | 0.183 |
|
| ||||
| FES, parental control | 11.73 (2.34) n = 119 |
11.60 (2.47) n = 40 |
t157 = −0.29 | 0.772 |
Note: FES = Family Environment Scale.
a
Due to small cell counts, the race/ethnicity variable was collapsed into three categories: 1) non-Hispanic White; 2) Hispanic, any race; and 3) non-Hispanic, non-White.
b
Due to expected cell count less than five in Pearson chi-square analyses, categories were recoded into no risk versus any risk including slight, moderate, or great risk.