Trends in drop out, drug free discharge and rates of re-presentation: a retrospective cohort study of drug treatment clients in the North West of England

Table 2 Factors predicting drop out from drug treatment compared to drug free discharge

Factors predicting drop out from treatment (N = 4291)
Variable	Adjusted odds ratio (95% confidence interval)	P value
Age group		0.013
10 to 19		Ref
20 to 29	0.62 (0.45, 0.86)	0.003
30 to 39	0.68 (0.49, 0.93)	0.016
40 to 49	0.55 (0.37, 0.81)	0.003
50 to 59	0.43 (0.24, 0.76)	0.004
60 to 69	0.23 (0.02, 2.74)	0.245
Year		< 0.001
1998		Ref
1999	0.55 (0.46, 0.66)	< 0.001
2000/01*	1.53 (1.28, 1.83)	< 0.001
2001/02	2.22 (1.84, 2.67)	< 0.001

*Reporting changed from UK calendar to financial year to adhere to new national requirements.
Ref is the reference category.
Other variables entered into the analysis which were not significant were sex (P = 0.93) and new to treatment/previous treatment contact (P = 0.55).
Hosmer and Lemeshow Goodness-of-Fit Test: X ² = 8.102, P = 0.231.

ISSN: 1471-2458