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. Author manuscript; available in PMC: 2018 Nov 13.
Published in final edited form as: Am J Psychiatry. 2015 Mar 17;172(8):760–767. doi: 10.1176/appi.ajp.2014.14081014

TABLE 2.

Time to Lapse Among Patients Who Received Placebo or Clonidine in Addition to Buprenorphine: Final Modela

Parameter Parameter
Estimate		 Hazard Ratio 95% CI p
Clonidine −0.39 0.67 0.45, 1.00 0.05
No cocaine use −0.91 0.40 0.18, 0.86 0.02
Low cocaine use −0.64 0.53 0.31, 0.91 0.02
High cocaine use Reference 1.00
Cocaine-by-time interaction −0.01 1.00 0.43
a

Final Cox proportional hazards model predicting time to opioid lapse. The model controls for cocaine use during the 6-week baseline period and its interaction with time.