The purpose of this study is to test a text-delivered counseling program to stop or reduce cannabis use among young adults (ages 18 to 25).
After being informed about the study and potential risks, participants will complete online screening assessments. Those who are determined to be eligible via online screening will complete a urine drug screen to confirm eligibility. Once eligibility is confirmed, participants will be randomized either to the intervention group or to the wait-list control group. Those who are randomized to the intervention group will receive the 4-week text intervention via smartphone and complete assessments (including urine drug screens) at baseline, 1 month, 3 months, and 6 months. Those who are randomized to the wait-list control group will only complete the assessments (including urine drug screens) at baseline, 1 month, 3 months, and 6 months. Participants who are initially assigned to the wait-list control group can choose to receive the text intervention once their 6-month participation is complete.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
1,077
4-week text counseling program
Colorado State University
Fort Collins, Colorado, United States
University of Tennessee Knoxvile
Knoxville, Tennessee, United States
Change from Baseline in Tetrahydrocannabinol (Delta-9-THC-COOH) levels
Urine THC levels (50ng/mL, 100ng/mL, 200ng/mL, 300ng/mL) will provide a biological measure for current cannabis use.
Time frame: Baseline, 1 month, 3 months, 6 months
Change in Past 30-Day Cannabis Use
Past-30-day substance use (cannabis, alcohol, tobacco, other drugs) and consequences are measured using the Alcohol, Smoking and Substance Involvement Screening Test
Time frame: Baseline, 1 month, 3 months, 6 months
Change in Environmental Risk Assessment
Participants will report using the Ecological Momentary Assessment reporting about Craving (0=none-10= intense), Cannabis Use (0=none-10= a lot), Mood (0=very good-10= very depressed), and Stress (0=no stress-10 = very stressed) on a 10 point scale for each item
Time frame: Baseline, 1 month, 3 months, 6 months
Change in Young Adult Social Network Assessment
Participants report information on each their 3 closest friends, representing their egocentric network. Individual friend scores are totaled based on all 8 risky and prosocial items (2-9). Thus, each peer's score has a potential range from -32 to 32, with greater scores indicating a healthier relationship. The total peer network health scores is based on the sum of all 24 risky and prosocial items across all three friends. Assuming three peers per participant, total network quality scores may range from -96 to 96, with lower scores indicating greater network risk and higher scores indicating greater network protection.
Time frame: Baseline, 1 month, 3 months, 6 months
Cost Measures
Cost of intervention implementation will be compared to typical treatment cost for cannabis use disorder
Time frame: 6 months
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