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. Author manuscript; available in PMC: 2012 Mar 30.

Published in final edited form as: Psychiatry Res. 2011 Mar 30;186(1):46–52. doi: 10.1016/j.psychres.2010.07.035

Table 1.

Demographic information

	Group
	CON Mean (S.D.)	THC Mean (S.D.)	p
Sex (Males: Females)	21 : 24	40 : 22	NS^a
Age	21.53 (3.27)	21.11 (3.55)	NS^b
Education	14.93 (1.60)	14.23 (1.36)	< 0.05^b
Picture Completion (WAIS)	13.04 (3.57)	12.05 (2.46)	NS^b
Digit Symbol Coding (WAIS)	11.93 (2.96)	10.98 (2.56)	NS^b
Similarities (WAIS)	12.38 (2.86)	12.53 (2.73)	NS^b
Digit Span (WAIS)	11.76 (2.72)	11.87 (3.10)	NS^b
Drinks/week	0.89 (1.51)	5.53 (4.67)	< 0.001^b
Tobacco use (Users:Non-users)	1 : 43	24 : 35	< 0.001^a
Age at First Cannabis Use (Yrs)		15.38 (2.17)
Total Years of Use		5.59 (3.33)
Frequency of Cannabis Use (previous month)		40.94 (41.10)

Note: N.S. = non-significant.

^a

Chi-square,

^b

t-test.