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. Author manuscript; available in PMC: 2016 Sep 1.
Published in final edited form as: Drug Alcohol Depend. 2015 Jul 2;154:222–228. doi: 10.1016/j.drugalcdep.2015.06.041

Table 1.

Descriptive Statistics.

Boys Girls Children
Sample size (n, % of total) 63 (43%) 83 (57%) 146
Child marijuana use onset (n who onset /n at-risk to onset, % who onset)
    Prior to age 11 years 0/63 (0%) 0/83 (0%) 0/146 (0%)
    Age 11-13 years 3/59 (5%) 0/77 (0%) 3/136 (2%)
    Age 13-15 years 8/51 (16%) 7/72 (10%) 15/123 (12%)
    Age 15-17 years 14/33 (42%) 9/38 (24%) 23/71 (32%)
    Age 17-19 years 4/9 (44%) 8/16 (50%) 12/25 (48%)
Parental monitoring −0.29 (1.13) 0.22 (0.83) 0 (1.00)
Parental disapproval of child marijuana use −0.01 (0.97) 0.01 (1.02) 0 (1.00)
Child exposure to marijuana use −0.07 (0.96) 0.05 (1.03) 0 (1.00)
Child peer marijuana use 0.05 (1.13) −0.04 (0.89) 0 (1.00)
Child deviant peer association 0.17 (1.03) −0.13 (0.97) 0 (1.00)
Overall contextual risk 0.06 (1.03) −0.05 (0.98) 0 (1.00)
Child alcohol use onset prior to or concurrent 33 (52.4%) 29 (34.9%) 62 (42.5%)
with marijuana use onset (n, %)
Parent adolescent marijuana use −0.16 (0.98) 0.12 (1.01) 0 (1.00)

Note: Tabled values denote mean (standard deviation) unless noted otherwise.