Table 1.

Definition of Treatment Engagement Variables

Treatment Component	Treatment Engagement Variable	Operational Definition of Treatment Variable
CBT Exposure	CBT Sessions	Number of CBT sessions attended during the 12-week treatment protocol. All subjects were invited to attend one 50-min CBT sessions per week during the 12 week protocol (i.e., total of up to 12 CBT sessions). CBT sessions were held individually with a clinician trained in CBT. Subjects could still remain active in the RCT if they failed to attend CBT sessions, so CBT sessions are not fully predicted by the number of weeks in treatment.
CM Exposure	CM Prizes	Number of CM prizes drawn during the RCT protocol, within the group randomized to CM treatment. Prizes were awarded for submission of urines as scheduled (thrice weekly) that were negative for cocaine and in-person observed administration of study pills as scheduled (thrice weekly). The number of prize draws increased for consecutive cocaine-negative urines and pill adherences and decreased following failure to provide a scheduled cocaine-negative urine sample (see Methods and Supplemental Materials for details).
Disulfiram Exposure	Disulfiram Medication Days	Number of days of observed (during in person visit days) or self-reported (during take-home pill days) adherence to the medication protocol, within individuals randomized to disulfiram. During thrice-weekly sessions, subjects were observed taking their assigned pills and were given take-home doses of medications and asked to self-report their adherence to prior take-home medication days since last appointment.

Note. CBT: Cognitive Behavioral Therapy; CM: Contingency Management; RCT: Randomized Clinical Trial.