A Hybrid Effectiveness-Implementation Trial of a School-Based Teen Marijuana Checkup

The objectives of the proposed study are to advance Type 2 translational science through an
effectiveness-implementation "type 2" hybrid design to evaluate the clinical and
cost-effectiveness of an efficacious intervention (Teen Marijuana Check-Up, TMCU) and compare
the feasibility, acceptability, impact and cost-effectiveness of two integrity monitoring
support systems. Marijuana continues to be the most frequently used drug in the U.S. and
adolescent use is associated with negative effects such as academic failure, dropout, and
emotional problems. Although marijuana is the most common presenting substance for 12-17 year
olds seeking substance abuse treatment, few voluntarily seek indicated services. The TMCU is
a brief, school-based motivational enhancement therapy approach that has been systematically
evaluated in three randomized controlled trials with reliable beneficial effects in prompting
voluntary participation in the intervention and decreasing adolescent marijuana use. With
TMCU now well-positioned for broad dissemination, its public health impact may be enhanced by
further research addressing: 1) to what extent its documented efficacy under controlled
conditions translates to real-world effectiveness, and 2) what support systems are most
useful in promoting sustained integrity in its delivery by the available school-based
personnel. The proposed type 2 effectiveness/implementation hybrid trial will include
randomization at multiple levels. Students will be randomly-assigned in a 1:2 ratio to
'services-as-usual' and TMCU intervention conditions, and school-based personnel identified
to deliver TMCU will be randomly-assigned to do so under governance of a 'gold-standard'
training/oversight support system (i.e., rapid, continual performance-based feedback and
weekly coaching about integrity of TMCU delivery) or a less resource-intensive support system
similarly including performance-based feedback but with process benchmarking (defined by
prior performance of research interventionists in TMCU efficacy trials) prompting points at
which these school-based personnel receive purveyor coaching. Expected trial participation of
ten schools will enable recruitment of 30 TMCU interventionists, and access to a pool of 250
marijuana-using students during a two-year implementation period. This nested design (e.g.,
students in schools/intervention conditions; interventionists in schools/training/oversight
support systems) will utilize multilevel models in study analyses to account for possible
school-level clustering. A cost analysis will also be conducted. Longitudinal outcome and
process data will be collected from school based staff (6, 12, 18, & 24 month follow-ups) and
students (3 and 6 month followups).

The trial will occur in Washington state at an opportune time when legislative, fiscal, and
socio-cultural factors converge to heighten potential adolescent exposure to
marijuana-related harms—represents an effort by this investigative team to respond to such
local challenges in a manner that will advance understanding of best practices for
dissemination and implementation of this and other efficacious, school-based interventions

Group 1: Administrators from local High Schools.

Inclusion Criteria:

- age 21 and older

- in an administrative role at one of the 10 participating high schools.

Exclusion Criteria:

Group 2: School Staff- Climate Survey Respondents.

Inclusion Criteria:

- age 21 and older

- in a staff position at one of the 10 participating high schools.

Exclusion Criteria:

Group 3: School Based Staff - Interventionists.

Inclusion Criteria:

- willing to participate in TMCU implementation procedures (i.e., randomization to
coaching group, training, supervision and feedback, monitored performance via
audio-recorded sessions),

- willing to share some personal demographic data,

- permission from supervisor,

- a two -year commitment and availability to participate in the project, and

- willingness to have sessions audio-recorded for feedback.

Exclusion Criteria: Otherwise eligible SBS will be excluded if

- plan to leave the school within the next year or,

- have an extended absence (e.g., 3 month parental leave, semester sabbatical) planned.

Group 4: Marijuana Using Students.

Inclusion Criteria:

- age (14-21 years old),

- grade (9-12)

- marijuana use

- willing to have sessions audio-recorded.

Exclusion Criteria: Individuals otherwise eligible will be excluded if:

- not fluent in English,

- have a thought disorder that precludes full participation, or

- refuse to accept randomization to condition.