Table C.1.

Rates of post-discharge outpatient addiction treatment and mutual help within study arms. Supplemental data are provided showing rates of service receipt at months 8 and 12, stratified by the receipt of services at month 4.

	Outpatient addiction treatment			Mutual help
	Month 4	Month 8	Month 12	Month 4	Month 8	Month 12
	Sample size at each follow-up period % (n) receiving treatment
Among all participants	n = 311	n = 297	n = 281	n = 298	n = 288	n = 279
Overall	36.0% (112)	23.9% (71)	19.9% (56)	60.1% (179)	60.1% (173)	57.7% (161)
A-CHESS arm (n = 156)	40.4% (63)	29.5% (43)	25.7% (35)	63.2% (96)	63.6% (91)	64.7% (88)
Control arm (n = 155)	31.6% (49)	18.5% (28)	14.5% (21)	56.9% (83)	56.6% (82)	51.1% (73)
Among those receiving the service at month 4	n = 112	n = 109	n = 103	n = 179	n = 162	n = 160
Overall	--	42.2% (46)	28.2% (29)	--	82.7% (134)	77.5% (124)
A-CHESS arm	--	48.3% (29)	34.5% (20)	--	86.4% (76)	82.6% (71)
Control arm	--	34.7% (17)	20% (9)	--	78.4% (58)	71.5% (53)
Among those not receiving the service at month 4	n = 199	n = 184	n = 176	n = 119	n = 112	n = 107
Overall	--	13.0% (24)	15.34% (27)	--	25.9% (29)	26.2% (28)
A-CHESS arm	--	16.3% (14)	19.2% (15)	--	21.6% (11)	28.3% (13)
Control arm	--	10.2% (10)	12.2% (12)	--	29.5% (18)	25.6% (15)

Proportions were calculated overall and within study arm among participants with complete data within each follow-up interview.