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. 2015 Mar 10;15:233. doi: 10.1186/s12889-015-1585-9

Table 3.

Co-occurrence of additional substance use behaviours for those who smoked marijuana, smoked tobacco, or engaged in binge drinking in the past month

n Weighted % (95% CI)
Smoked marijuana
  Only smoked marijuana 47 17.6 (11.5-23.7)
  Also smoked tobacco but did not binge drink 42 14.2 (10.1-18.2)
  Also engaged in binge drinking but did not smoke tobacco 60 21.4 (15.8-27.0)
  Also both smoked tobacco and engaged in binge drinking 131 46.8 (40.1-53.5)
Smoked tobacco
  Only smoked tobacco 77 23.9 (18.9-28.9)
  Also smoked marijuana but did not binge drink 42 13.0 (9.4-16.6)
  Also engaged in binge drinking but did not smoke marijuana 58 20.2 (15.5-25.0)
  Also both smoked marijuana and engaged in binge drinking 131 42.9 (36.9-48.9)
Engaged in binge drinking
  Only engaged in binge drinking 214 45.3 (39.9-50.6)
  Also smoked marijuana but did not smoke tobacco 60 13.0 (9.7-16.3)
  Also smoked tobacco but did not smoke marijuana 58 13.4 (10.2-16.5)
  Also both smoked marijuana and tobacco 131 28.4 (23.0-33.7)