NCT02152033.

Methods	Randomised controlled trial
Participants	Parents of young adults leaving residential substance abuse treatment
Interventions	Title of the intervention: Home‐based Continuing Care (HCC) Aim: To help parents support the recovery of their Young Adult (YA) child who was leaving residential substance abuse treatment Interventionist(s): Masters or doctoral level therapists in social work or psychology Duration: Not specified (5 individual sessions and 1 joint session with their child, each session was 45‐50 min). Content: All sessions occurred over the phone or Cisco WebEx meetings. Parents participated in 5 individual sessions and 1 joint session with their child (45‐50 minutes each). Young Adults (YAs) participated in 1‐3 individual meetings (30‐45 minutes each) and 1 joint session (45‐50 minutes). In addition, YAs were contacted weekly for the first 8 weeks of HCC, then every other week for the remaining 24 weeks (20 calls total). He or she were asked questions addressing risk and protective factors for relapse. Finally, parents were trained to collect and test their child's urine sample and deliver incentives to the YA contingent upon biologically‐verified abstinence and verified engagement in continuing service plan activities. Urine samples were collected regularly over a 32‐week period. Standardisation: No detail provided Comparison group: Continuing service plan recommended by the residential treatment program. Parents were told to support this and were sent information on continuing care developed by the Treatment Research Institute and the Partnership @ Drugfree.org (continuingcare.drugfree.org). No supplemental services were provided during the study. Parents were trained to collect urine samples for research purposes only. Parents and YAs were offered separate 4‐hour workshops after they had completed participation as an added study participation incentive for this group.
Outcomes	1. Satisfaction: Parent Happiness with Youth 2. Parent and Young Adult Treatment Retention 3. Parent and Young Adult Treatment: Treatment Evaluation Inventory 4. Parent and Young Adult Engagement in HCC by number of calls completed 5. Parent and Young Adult Recruitment Rate by monthly recruitment rate Data were collected week 16 and 32
Notes	Author confirmed that the interventionists were healthcare professionals. Results have yet to be submitted for publication. Author stated almost all of the sessions were conducted by phone ‐ full detail of the intervention and its delivery needs to be assessed prior to inclusion in this review.