Alcohol Consumption
Conditions
Brief summary
Excessive college student drinking represents an important public health problem for both the students themselves and those with whom they interact. The objective of this research is to better understand how to reduce such high-risk drinking by improving prevention and treatment programs, which will provide an overall public health benefit. Subjects in the study will be randomized to one of two brief intervention conditions or an education-only control condition. It is hypothesized that those in the intervention conditions will report greater reductions in alcohol use and alcohol-related problems than those in the control condition.
Detailed description
The primary objective of this project is to examine factors that are associated with the effectiveness of intervention programs designed to reduce high-risk drinking among heavy drinking college students. Previous research has found similar effect sizes for different types of multi-component, brief interventions among college students, but little research has assessed the degree to which specific components of such interventions are associated with intervention outcomes. One common component of motivational enhancing interventions among college students involves providing cognitive-behavioral self-control strategies designed to reduce one's use of alcohol, which we term protective behavioral strategies (PBS). However, there are two important factors that limit our understanding of the effects of PBS on client outcomes. First, the use of these strategies in motivational enhancing programs has generally not been assessed in a systematic manner, due in part to the fact that until recently a standardized measure of such strategies did not exist. Second, researchers have yet to conduct studies that dismantle the specific effects associated with the PBS component on client outcomes. That is, studies have not tested interventions with and without assessment and feedback regarding a client's use of PBS. Participants in this project will be at-risk college student drinkers who will be assigned to one of three conditions: a brief intervention that includes a focus on PBS, a brief intervention that does not include this focus, and an education-only control condition. Participant will complete self-report measures of alcohol-related variables at baseline, 30-day, and 6-month follow-ups. Mixed-model analyses will be used to determine the effectiveness of the intervention programs, and structural equation modeling will be used to determine if increases in PBS result in reductions in alcohol use/alcohol-related problems.
Interventions
Personalized feedback on use of protective behavioral strategies.
Personalized feedback on how one's own drinking compares to relevant norms.
Educational information about harms associated with heavy drinking.
Sponsors
Study design
Eligibility
Inclusion criteria
* At least one binge drinking episode in the preceding month
Exclusion criteria
* At-risk for alcohol dependence or major depressive disorder
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Drinks Per Week | 6 Months | — |
| Rutgers Alcohol Problems Index (RAPI) | 6 months | Total scores on an alcohol problems scale. Possible score range = 0-92. Higher scores are indicative of more alcohol-related problems. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Drinking Norms Rating Form | 6 months | Perceived drinking among other students, represented by standardized scores on the Drinking Norms Rating Form. Higher values indicate that the individual perceives higher levels of drinking among other students. Because the scores are standardized their is no hypothetical minimum or maximum, and the scale is standardized with a mean of 0 and standard deviation of 1. So, a mean value of 1.52 means that participants in that condition had an average score that was 1.52 standard deviation above the overall mean of the sample. |
| Protective Behavioral Strategies Scale. | 6 months | Use of protective behavioral strategies related to alcohol use. Higher scores indicate more use of the strategies. A total score was calculated by summing the three subscale scores on the measure (range = 3-18). |
Countries
United States
Participant flow
Participants by arm
| Arm | Count |
|---|---|
| Protective Behavioral Strategies Protective Behavioral Strategies Feedback: Personalized feedback on use of protective behavioral strategies. | 111 |
| Personalized Normative Feedback Personalized Normative Feedback: Personalized feedback on how one's own drinking compares to relevant norms. | 121 |
| Alcohol Education Alcohol Education: Educational information about harms associated with heavy drinking. | 133 |
| Total | 365 |
Baseline characteristics
| Characteristic | Personalized Normative Feedback | Alcohol Education | Protective Behavioral Strategies | Total |
|---|---|---|---|---|
| Age, Categorical <=18 years | 0 Participants | 0 Participants | 0 Participants | 0 Participants |
| Age, Categorical >=65 years | 0 Participants | 0 Participants | 0 Participants | 0 Participants |
| Age, Categorical Between 18 and 65 years | 121 Participants | 133 Participants | 111 Participants | 365 Participants |
| Age, Continuous | 20.12 Years STANDARD_DEVIATION 1.38 | 20.20 Years STANDARD_DEVIATION 1.31 | 19.95 Years STANDARD_DEVIATION 1.36 | 20.10 Years STANDARD_DEVIATION 1.35 |
| Region of Enrollment United States | 121 participants | 133 participants | 111 participants | 365 participants |
| Sex: Female, Male Female | 50 Participants | 48 Participants | 29 Participants | 127 Participants |
| Sex: Female, Male Male | 71 Participants | 85 Participants | 82 Participants | 238 Participants |
Adverse events
| Event type | EG000 affected / at risk | EG001 affected / at risk | EG002 affected / at risk |
|---|---|---|---|
| deaths Total, all-cause mortality | — / — | — / — | — / — |
| other Total, other adverse events | 0 / 111 | 0 / 121 | 0 / 133 |
| serious Total, serious adverse events | 0 / 111 | 0 / 121 | 0 / 133 |
Outcome results
Drinks Per Week
Time frame: 6 Months
| Arm | Measure | Value (MEAN) | Dispersion |
|---|---|---|---|
| Protective Behavioral Strategies | Drinks Per Week | 12.55 drinks per week | Standard Deviation 8.96 |
| Personalized Normative Feedback | Drinks Per Week | 9.57 drinks per week | Standard Deviation 8.78 |
| Alcohol Education | Drinks Per Week | 13.74 drinks per week | Standard Deviation 10.77 |
Rutgers Alcohol Problems Index (RAPI)
Total scores on an alcohol problems scale. Possible score range = 0-92. Higher scores are indicative of more alcohol-related problems.
Time frame: 6 months
| Arm | Measure | Value (MEAN) | Dispersion |
|---|---|---|---|
| Protective Behavioral Strategies | Rutgers Alcohol Problems Index (RAPI) | 7.68 units on a scale | Standard Deviation 7.25 |
| Personalized Normative Feedback | Rutgers Alcohol Problems Index (RAPI) | 7.76 units on a scale | Standard Deviation 9.42 |
| Alcohol Education | Rutgers Alcohol Problems Index (RAPI) | 8.91 units on a scale | Standard Deviation 9.17 |
Drinking Norms Rating Form
Perceived drinking among other students, represented by standardized scores on the Drinking Norms Rating Form. Higher values indicate that the individual perceives higher levels of drinking among other students. Because the scores are standardized their is no hypothetical minimum or maximum, and the scale is standardized with a mean of 0 and standard deviation of 1. So, a mean value of 1.52 means that participants in that condition had an average score that was 1.52 standard deviation above the overall mean of the sample.
Time frame: 6 months
| Arm | Measure | Value (MEAN) | Dispersion |
|---|---|---|---|
| Protective Behavioral Strategies | Drinking Norms Rating Form | 1.52 units on a scale (standardized) | Standard Deviation 3.52 |
| Personalized Normative Feedback | Drinking Norms Rating Form | -2.71 units on a scale (standardized) | Standard Deviation 2.57 |
| Alcohol Education | Drinking Norms Rating Form | 1.20 units on a scale (standardized) | Standard Deviation 3.79 |
Protective Behavioral Strategies Scale.
Use of protective behavioral strategies related to alcohol use. Higher scores indicate more use of the strategies. A total score was calculated by summing the three subscale scores on the measure (range = 3-18).
Time frame: 6 months
| Arm | Measure | Value (MEAN) | Dispersion |
|---|---|---|---|
| Protective Behavioral Strategies | Protective Behavioral Strategies Scale. | 12.41 units on a scale | Standard Deviation 1.94 |
| Personalized Normative Feedback | Protective Behavioral Strategies Scale. | 12.14 units on a scale | Standard Deviation 2.24 |
| Alcohol Education | Protective Behavioral Strategies Scale. | 11.44 units on a scale | Standard Deviation 2.01 |