Table 3.

Multiple regression analysis of the proportion of abstinence days 30 days prior to follow-up

Characteristic	Coefficient b	P-value	(95% CI)
Constant	72.5	0.001	(40.3 to 104.8)
Injected drug abusea	−25.5	0.002	(−41.7 to −9.2)
Involuntary hospital admission	−16.0	0.076	(−33.7 to 1.7)
Readiness for change (RCTQ)	14.0	0.083	(−1.9 to 29.9)
Age	0.2	0.696	(−0.7 to 1.0)
Gender	−8.6	0.318	(−25.5 to 8.4)

^aDuring the 6 months prior to admission