Table 3.

Differences in Drug Treatment Utilization at 3-Month Follow-up by Study Group, Baseline Versus 3-Month Follow-up (N = 633)

	Control Group (n = 327)			Treatment Group (n = 306)
	Baseline, %	3-Month Follow-up, %	Baseline – 3-month Follow-up, Δ1% (95% CI)	Baseline, %	3-Month Follow-up, %	Baseline – 3-Month Follow-up, Δ2% (95% CI)	Control Group – Treatment Group, Δ1% – Δ2% (95% CI)
Currently receiving treatment	8.6	11.9	−3.4 (−6.7 to 0.3)	8.5	13.7	−5.2 (−8.8 to −1.3)	1.8 (−3.5 to 6.8)
Received treatment in the past 3 months, but not currently receiving treatment	5.5	5.5	0.0 (−3.1 to 3.1)	6.5	4.6	2.0 (−1.6 to 5.6)	−2.0 (−6.5 to 2.4)
Contacted treatment only in the past 3 months	6.4	2.5	4.0 (1.0 to 7.3)	4.6	2.3	2.3 (−0.3 to 4.9)	1.7 (−2.4 to 6.1)
No contact, no treatment in past 3 months	79.5	80.1	−0.6 (−4.6 to 3.7)	80.4	79.4	1.0 (−4.2 to 6.2)	−1.6 (−8.3 to 5.5)

Note: Participants who responded with “don’t know” or “refuse to answer” were considered to be in the “No contact, no treatment” category at 3 months. The sum of categories at 3-month follow-up should then equal 100% by study arm (e.g., currently receiving treatment, received treatment past 3 months, contacted only, and no contact or treatment in past 3 months. All CIs are calculated using the bootstrap method with 1,000 resamples.