Change the Cycle: An RCT to Prevent Injection Initiation

The study goal is to conduct a large-scale randomized controlled trial (RCT) of the "Change the Cycle" (CTC) intervention. CTC is an hour long, single-session, one-on-one intervention that aims to reduce injection initiation by encouraging active PWID to not promote drug injection, model injection behavior, describe how to inject, or assist in injection initiations of non-injectors. CTC uses the Information-Motivation-Behavioral skills (IMB) model to achieve changes among active PWID through seven short modules. Information and motivational domains are addressed in guided conversations about (1) their own first injection episode and consequences, (2) past experiences initiating injection-naive people and consequences, (3) health, legal, and social risks related to injection drugs, (4) health, legal, social risks of initiating people, and (5) identifying their own behaviors that might promote injection among others. The behavioral skills are addressed through (6) skill-building discussions and consideration of common initiation scenarios, and (7) safer injection education.

Aim 1: To test the efficacy of CTC on reducing the number of non-injectors initiated into injection (counts) by PWID. Hypothesis 1: PWID who receive CTC will report initiating fewer non-injectors into drug injection at 6 and 12 months as compared with PWID in the control condition.

Aim 2: To test the efficacy of CTC on reducing the number of times PWID are asked to initiate (counts) someone into injection. Hypothesis 2: PWID who receive CTC will report having been asked fewer times to initiate someone into drug injection at 6 and 12 months as compared with PWID in the control condition.

Aim 3: To test whether injection initiation social learning risks (injecting in front of, describing injection to, and speaking positively about injection to non-injectors) act as mediational mechanisms for the efficacy of the CTC intervention on initiation and request-to-initiate outcomes. Hypothesis 3: Social learning variables will significantly mediate the association between the CTC intervention and episodes of initiating and being requested to initiate someone into drug injection at 6 and 12 months.

To achieve these aims, active PWID (N=1,076) will be randomly assigned to receive CTC or an equal attention control condition in Los Angeles (LA) and San Francisco (SF), CA. Injection initiation and injection initiation social learning variables will be collected at baseline, 6 months, and 12 months using computer-assisted personal-interviewing (CAPI). The equal attention control condition will focus on improving nutrition, specifically increasing fresh water intake and protein consumption, and will replicate CTC in length, theoretical foundation (IMB), and modality (1 on 1 personal session).

Inclusion criteria

• Self-reported Injection an illicit drug in the last 30 days,
• visible evidence of injection such as track mark or stigmata,
• at least 18 years of age

Exclusion criteria

• Under 18 years of age,
• no self-reported drug injection in the last 30 days,
• no physical evidence of recent drug injection.