. Author manuscript; available in PMC: 2009 Mar 1.

Published in final edited form as: Arch Pediatr Adolesc Med. 2009 Feb;163(2):119–125. doi: 10.1001/archpediatrics.2008.542

Table 4.

Odds Ratios (95% confidence intervals) of multiple logistic regression analyses to determine the association between the prevalence of cannabis use, survey year, and evenings out with friends separately for boys and girls and for countries with decreasing or increasing cannabis use

	Boys	Girls
Decreasing countries
Survey year¹	0.66^*** (0.59 - 0.73)	0.71^*** (0.64 - 0.79)
Evenings out with friends²	1.27^*** (1.27 - 1.29)	1.32^*** (1.24 - 1.39)
Interaction survey ^* evenings	1.01 (0.99 - 1.04)	1.01 (0.98 - 1.03)
R²_(Nagelkerke)	7.9%	8.2%
Increasing countries³
Survey year¹	1.42 (0.98 - 2.10)	1.80^* (1.13 - 2.86)
Evenings out with friends²	1.32^*** (1.24 - 1.39)	1.33^*** (1.23 - 1.44)
Interaction survey year ^* evenings out	0.97 (0.90 - 1.05)	0.98 (0.89 - 1.08)
R²_(Nagelkerke)	7.5%	7.4%

Note.

coding: 2002 = 0, 2006 = 1

answer range from 0 to 7 evenings per week

Estonia, Lithuania, Malta, and Russia

p<.05

^***

p<.001