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. Author manuscript; available in PMC: 2022 Sep 1.
Published in final edited form as: Psychol Addict Behav. 2021 Feb 22;35(6):650–658. doi: 10.1037/adb0000704

Table 1.

Participant Use of Alcohol and Cannabis at Time 1 and Time 2 (N = 1294).

Time 1 (Fall)
N (%)		 Time 2 (Spring)
N (%)
No use of either alcohol or cannabis 338 (26.1%) 313 (24.2%)
Alcohol use only 512 (39.6%) 476 (36.8%)
Cannabis use only 7 (0.5%) 12 (0.9%)
Concurrent use 102 (7.9%) 147 (11.4%)
Simultaneous use 335 (25.9%) 346 (26.7%)

Note. Concurrent use was defined as use of both alcohol and cannabis in the past month, but not in the same three-hour time period. Simultaneous use was defined as the use of both alcohol and cannabis in the same three-hour time period.