Table 1.

Comparison of socio-demographic characteristics among Powder Cocaine Users, Crack Cocaine Users and Dual Users groups.

	Powder Cocaine Users		Crack Cocaine Users		Dual Users		Total	pvalue
Age	28.1		26.8		26.2		26.7	p = 0.01
	SD = 7.7		SD = 7.3		SD = 6.8		7.2
Ethnicity
Caucasian	125	80%	34	63%	339	70%	498	p = 0.01
African	31	20%	20	37%	143	30%	194
Sex
Male	149	94%	54	98%	465	96%	668	p > 0.05
Female	9	6%	1	2%	21	4%	31
Education
primary school or less	92	62%	47	87%	347	73%	486	P = 0.001
secondary school or more	57	38%	7	13%	127	27%	191
Marriage Status
single	96	61%	34	62%	289	60%	419	p > 0.05
married/cohabiting	37	23%	15	27%	128	27%	180
divorced/widowed	25	16%	6	11%	63	13%	94