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. Author manuscript; available in PMC: 2021 Jul 1.
Published in final edited form as: Drug Alcohol Depend. 2020 Apr 26;212:108017. doi: 10.1016/j.drugalcdep.2020.108017

Table 4.

Association of digital media use subcategories with cannabis use initiation across follow-up

Any Cannabis Use Initiationd Combustible Cannabis Use Initiation Other Cannabis Use Initiationf
Na (row %) Adj. ORc P-value Na (row %) Adj. ORc P-value Na (row %) Adj. ORc P-value
Social Media Posting 0e 312 (8.0%) Ref 0.021 244 (6.2%) Ref 0.024 236 (6.1%) Ref 0.033
1e 41 (9.6%) 0.98 (0.66–1.45) 30 (7.1%) 0.86 (0.54–1.36) 31 (7.4%) 1.02 (0.66–1.59)
2e 39 (14.8%) 1.95 (1.20–3.17) 31 (11.8%) 1.97 (1.15–3.37) 32 (12.4%) 2.02 (1.18–3.45)
Reading news/articles & Browsing photos 0e 177 (8.1%) Ref 0.0064 134 (6.2%) Ref 0.048 134 (6.3%) Ref 0.039
1e 157 (9.6%) 0.93 (0.71–1.21) 124 (7.6%) 1.00 (0.74–1.34) 119 (7.4%) 0.90 (0.67–1.22)
2e 55 (7.0%) 0.52 (0.34–0.79) 45 (5.8%) 0.58 (0.36–0.94) 44 (5.8%) 0.55 (0.34–0.88)
Chatting & Shopping 0e 320 (8.3%) Ref 0.81 249 (6.5%) Ref 0.74 241 (6.3%) Ref 0.96
1e 45 (8.3%) 0.89 (0.62–1.27) 34 (6.3%) 0.87 (0.58–1.31) 37 (7.0%) 0.96 (0.65–1.43)
2e 19 (11.1%) 0.99 (0.52–1.90) 16 (9.3%) 1.10 (0.54–2.22) 15 (8.7%) 0.92 (0.44–1.90)
Gaming 0e 293 (8.4%) Ref 0.62 227 (6.5%) Ref 0.49 221 (6.4%) Ref 0.45
1e 41 (7.7%) 0.96 (0.66–1.40) 29 (5.5%) 0.83 (0.53–1.28) 32 (6.1%) 1.03 (0.67–1.56)
2e 52 (9.4%) 1.19 (0.81–1.76) 43 (7.7%) 1.15 (0.74–1.77) 42 (7.7%) 1.32 (0.85–2.03)
Checking In 0e 78 (5.6%) Ref 0.0065 59 (4.2%) Ref 0.0072 58 (4.0%) Ref 0.014
1e 111 (8.0%) 1.39 (1.00–1.93) 86 (6.2%) 1.48 (1.01–2.15) 85 (6.2%) 1.47 (1.01–2.14)
2e 200 (11.0%) 1.71 (1.23–2.38) 157 (8.6%) 1.83 (1.26–2.67) 158 (8.8%) 1.76 (1.20–2.57)
Music 0e 218 (7.8%) Ref 0.41 170 (6.1%) Ref 0.48 168 (6.1%) Ref 0.85
1e 174 (9.4%) 1.11 (0.87–1.43) 135 (7.3%) 1.11 (0.83–1.47) 131 (7.2%) 1.03 (0.77–1.37)
a

The number of observations with (nonmissing) data available. Each student could contribute multiple observations.

b

The estimate of the association of the respective regressor with cannabis initiation (vs. no initiation) across follow-up is adjusted for gender, ethnicity, baseline highest parental education, baseline free or reduced lunch, and wave.

c

The estimate of the association of the respective regressor with cannabis initiation (vs. no initiation) across follow-up is simultaneously adjusted for gender, ethnicity, baseline highest parental education, baseline free or reduced lunch, wave, and all other social media predictor variables.

d

Any cannabis use initiation includes reported use of combustible cannabis, blunts, and edible, vaporized, or synthetic cannabis.

e

Reported frequency of digital media use. 0= no high frequency use of either digital media item; 1= high frequency use of 1 item; 2= high frequency use of both digital media items.

f

Other cannabis use initiation includes reported use of edible, vaporized, or synthetic cannabis.