Evaluating Within-Person and Between-Person Effects Of A Personalized Normative Feedback Intervention On Drinking As They Are Moderated By Self-Determination

Not Applicable

Completed

• Conditions: Alcohol Drinking

• Registration Number: NCT03583515
• Lead Sponsor: University of Houston

Brief Summary

This study evaluates within-person and between-person effects of a personalized normative feedback intervention and injunctive norms as they are altered by self-determination in heavy drinkers. Half of participants will receive personalized normative feedback and the other half will receive control feedback about media use habits.

Detailed Description

Not available

Study Timeline

• Study Start: 2018-04-25
• Study First Submitted: 2018-06-01
• Study First Submitted QC: 2018-06-27
• Study First Posted: 2018-07-11
• Primary Completion: 2019-08-31
• Study Completion: 2019-08-31
• Status Verified: 2020-04
• Last Update Submitted: 2020-04-01
• Last Update Posted: 2020-04-02

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 136

Inclusion Criteria

• Student at the University of Houston
• Above 18 years of age
• Heavy drinker (more than 4 drinks [women] or 5 drinks [men] on a single occasion in the last 2.5 weeks and drinks, on average, at least once per week.

Exclusion Criteria

Not provided

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Primary Outcome Measures

Name	Time	Method
Between-Person Self-Determination by PNF Interaction Predicting Consumption	2-4 Weeks	A structural equation model will be fit with baseline consumption, self-determination, intervention condition, and the interaction between self-determination and condition predicting follow-up alcohol consumption. Consumption will be measured with the Alcohol Consumption Index, Quantity-Frequency-Peak Alcohol Use Index, and the Daily Drinking Questionnaire. These scales will be used as indicators of a single latent consumption variable. That latent consumption measure will be the outcome of interest.
Within-Person Self-Determination by PNF Interaction Predicting Consumption	17 Days	A multilevel model will be fit with baseline consumption, daily self determination, intervention condition, and the interaction between condition and daily self-determination predicting daily alcohol consumption. Consumption will be measured as the number of drinks consumed the previous evening.

Secondary Outcome Measures

Name	Time	Method
Within-Person Self-Determination by PNF Interaction Predicting Alcohol-Related Problems	17 Days	A multilevel model will be fit with baseline consumption, daily self determination, intervention condition, and the interaction between condition and daily self-determination predicting daily alcohol alcohol-related problems. Alcohol-related problems will be measured with a checklist of non-overlapping items from the Rutgers Alcohol Problems Index and the Young Adult Alcohol Consequences Questionnaire. This combined checklist will be used to create the overall problems outcome of interest.
Between-Person Self-Determination by PNF Interaction Predicting Alcohol-Related Problems	2-4 Weeks	A structural equation model will be fit with baseline consumption, alcohol-related problems, self-determination, intervention condition, and the interaction between self-determination and condition predicting follow-up alcohol-related problems. Alcohol-related problems will be measured with the Rutgers Alcohol Problems Index and the Young Adult Alcohol Consequences Questionnaire. Each of these problems measures will be split to form two indicators (for a total of four problems indicators) for an overall problems latent variable. This problems latent variable will then be used as the outcome of interest.

Trial Locations

Locations (1)

University of Houston; 🇺🇸 Houston, Texas, United States