Disentangling psychopathology, substance use and dependence: a factor analysis

BMC Psychiatry

Table 1 Self-reported substance use variables derived from Treatment Outcomes Profile (TOP)

	QF measures			Distribution of cases across quintile levels of substance use
Substances	Mean	SD	Range	Non-user	Light	Moderate	Frequent	Heavy
Alcohol (u)	40.43	53.72	1 – 252	136	32	19	21	24
Heroin (g)	0.91	1.51	0.01 – 10.50	148	35	10	22	17
Cannabis (j)	16.65	16.25	1 – 70	188	11	13	13	7
Crack (g)	0.47	0.68	0.02 – 3.50	191	13	9	10	9

Notes: QF quantity x frequency per week; alcohol measured in units (u); heroin and crack measured in grams (g); cannabis measured in joints (j)

ISSN: 1471-244X