Table 1. Demographics, Clinical Characteristics, and Personality Scores (MPQ) in Male and Female Cannabis Abusers and Healthy Controls.

Characteristic	Cannabis abusers		Healthy controls		P-value
	Male N=12	Female N=12	Male N=12	Female N=12	Group	Gender	Group × Gender
Age, years	29.0±8.8	24.6±4.3	30.3±7.0	26.2±26.2	NS	0.032	NS
Years of education	12.9±1.3	13.5±1.5	13.6±1.3	14.2±1.8	NS	NS	NS
BMI	25.7±3.1	22.6±3.5	24.9±3.1	23.7±2.2	NS	0.017	NS
Cigarette smokers	7 active 1 former	3 active 1 former	3 active 1 former	1 active 0 former	NS	NS	NS
Cannabis age initiation	14.8±3.0	15.2±2.4	−	−		NS
Days/week	6.7±.7	6.8±.5	−	−		NS
Joints/day	4.9±3.8	4.8±2.9	−	−		NS
Years abuse	12.9±9.1	9.0±4.7	−	−		NS
MDQ sum	6.5±2.7	4.3±2.6	−	−		NS
BDI	8.6±4.1	9.0±8.2	6.1±9.5	5.4±5.6	0.06	NS	NS
MPQ PEM	51.3±10.4	43.2±9.6	50.8±5.6	51.7±10.1	0.05	NS	NS
MPQ NEM	22.8±7.7	21.9±10.0	16.0±10.4	11.4±6.0	0.001	NS	NS
MPQ Constraint	45.6±7.4	49.8±8.1	48.6±10.9	54.0±7.9	NS	NS	NS

Abbreviations: BDI, Beck's Depression Index; BMI, body mass index; MDQ, Marijuana Dependence Questionnaire; MPQ, Multidimensional Personality Questionnaire; NEM, negative emotionality; NS, non-significant=p⩾0.1; PEM, positive emotionality.

Characteristics are listed with mean±SD. Mann–Whitney U test. Bold values indicate P-values <0.1.