Reduction in World Health Organization risk drinking levels
The Timeline Follow-Back calendar method of assessing standard alcohol drinks consumed each day over the past 90 days will be used to calculate the World Health Organization risk levels based on sex specific grams of alcohol consumed per day in the 30 days prior to the assessment, with levels defined as: low risk (0-20 females/0-40 males), moderate risk (21-40 females, 41-60 males), high risk (41-60 females, 61-100 males), and very high risk (61+ females/100+ males) we will examine those who achieve at least a 1-level and at least a 2-level reduction in risk drinking levels. The reference group for the 1-level reduction is no change or increase in WHO risk drinking level and the reference group for the 2-level reduction is 1-level reduction, no change, or increase in WHO risk drinking level. The Timeline Follow-Back Calendar will be administered once at baseline, and at follow-up months 6, 12, 18, 24, 30, and 36.
PROMIS Alcohol Negative Consequences
The Patient-Reported Outcomes Measurement Information System (PROMIS®) includes 7 items scored from never=1 to almost always=5 that assess negative consequences from alcohol use (e.g., I used poor judgment when I drank). The PROMIS Negative Alcohol Consequences measure will be administered once at baseline, and at follow-up months 6, 12, 18, 24, 30, and 36. Higher scores indicate more negative consequences.
PROMIS Preference Score (PROPr)
PROPr combines scores from 7 PROMIS domains (cognitive function, depression, fatigue, pain interference, physical function, ability to participate in social roles and activities, and sleep disturbance) into a single health utility score. The PROMIS PROPr will be administered once at baseline, and at follow-up months 6, 12, 18, 24, 30, and 36. Higher scores indicate better health.
Penn Alcohol Craving Scale
Five item measure of overall craving for alcohol. Responses range from 0 to 6 where 0 represents the absence of the specific craving symptom in the item, and 6 represents the maximum intensity or frequency of the craving symptom in the item. The Penn Alcohol Craving Scale will be administered once at baseline, and at follow-up months 6, 12, 18, 24, 30, and 36. Higher scores on the Penn Alcohol Craving Scale reflect more severe alcohol craving.
Alcohol Use Disorder symptoms
Total number of symptoms endorsed (yes or no) on an 11-item checklist of the symptoms of alcohol use disorder experienced in the past 12-months (baseline) and past 6-months (at 6-month follow-up assessments). The Alcohol Use Disorder Symptom checklist will be administered once at baseline, and at follow-up months 6, 12, 18, 24, 30, and 36. Higher scores indicate more symptoms of alcohol use disorder.
Reduction in percent heavy drinking days
Percent heavy drinking days will be calculated using the Timeline Follow-Back calendar method of assessing standard alcohol drinks consumed each day over the past 90 days. This measure will be used to identify the total number of occasions of daily heavy drinking (defined as 4 or more drinks for females and 5 or more drinks for males), and the percent heavy drinking days will be calculated as the number of heavy drinking days in the past 90 days divided by the total number of days in that time period (typically 90 days, unless some days are missing). The Timeline Follow-Back Calendar will be administered once at baseline, and at follow-up months 6, 12, 18, 24, 30, and 36. Higher percent heavy drinking days indicate more heavy drinking occasions in a 90-day period.
Reduction in drinks per drinking day
Drinks per drinking day will be calculated using the Timeline Follow-Back calendar method of assessing standard alcohol drinks consumed each day over the past 90 days. This measure will be used to identify the total number of drinks consumed on each drinking day, and the number of drinks per drinking drinking days will be calculated as the total number of drinks consumed in the past 90 days divided by the total number of days in that time period when drinking occurred (typically 90 days, unless some days are missing). The Timeline Follow-Back Calendar will be administered once at baseline, and at follow-up months 6, 12, 18, 24, 30, and 36. Higher drinks per drinking day indicates greater intensity of drinking in a 90-day period.
Reduction in percent drinking days
Percent drinking days will be calculated using the Timeline Follow-Back calendar method of assessing standard alcohol drinks consumed each day over the past 90 days. This measure will be used to identify the total number of occasions of drinking, and the percent drinking days will be calculated as the number of drinking days in the past 90 days divided by the total number of days in that time period (typically 90 days, unless some days are missing). The Timeline Follow-Back Calendar will be administered once at baseline, and at follow-up months 6, 12, 18, 24, 30, and 36. Higher percent drinking days indicate greater frequency of drinking in a 90-day period.
World Health Organization Quality of Life (WHOQOL - BREF) Measure
The WHOQOL-BREF is a 26-item instrument consisting of four domains: physical health (7 items), psychological health (6 items), social relationships (3 items), and environmental health (8 items); it also contains QOL and general health items. Each individual item of the WHOQOL-BREF is scored from 1 to 5 on a response scale, which is stipulated as a five-point ordinal scale. The scores are then transformed linearly to a 0-100-scale. The WHOQOL - BREF will be administered once at baseline, and at follow-up months 6, 12, 18, 24, 30, and 36. Higher scores on the WHOQOL-BREF reflect greater quality of life.
Substance Use Moderation Self-Efficacy Scale (SUM-SES)
The SUM-SES is a 12-item questionnaire that asks participants to indicate on a 0% to 100% scale regarding how confident they are that they would be able to resist drinking beyond their limit in a given situation. The SUM-SES will be administered once at baseline, and at follow-up months 6, 12, 18, 24, 30, and 36. Higher scores on the SUM-SES reflect greater confidence to resist drinking beyond one's limit.
Addiction Cycle - Negative Emotionality Scale
The negative emotionality domain of the addiction cycle is characterized by temptation to drink in situations when the person is experiencing negative emotions. The Negative Emotionality Scale consists of 4 items scored on a scale from 1=not at all tempted to 5=extremely tempted to drink when experiencing negative emotions. The Addiction Cycle Negative Emotionality scale will be administered once at baseline, and at follow-up months 6, 12, 18, 24, 30, and 36. Higher scores indicate a greater tendency to be tempted to drink in situations characterized by negative emotions.
Addiction Cycle - Incentive Salience Scale
The incentive salience domain of the addiction cycle is characterized by temptation to drink in situations when the person is experiencing rewarding or social pressure to drink. The Incentive Salience Scale consists of 4 items scored on a scale from 1=not at all tempted to 5=extremely tempted to drink when experiencing rewarding, craving, or social situations. The Addiction Cycle Incentive salience scale will be administered once at baseline, and at follow-up months 6, 12, 18, 24, 30, and 36. Higher scores indicate a greater tendency to be tempted to drink in situations characterized by reward, craving, and social pressure.
Addiction Cycle - Executive Function Scale
The executive function domain of the addiction cycle is characterized by loss of control over drinking. The Executive Scale consists of 1 binary yes/no item ("After taking one or two drinks, can you usually stop?") and 4 items scored on a scale from 1=indicating more control over drinking to 5=indicating loss of control over drinking. The Addiction Cycle Executive Function scale will be administered once at baseline, and at follow-up months 6, 12, 18, 24, 30, and 36. Higher scores indicate more impaired executive function and greater loss of control over drinking.
Purpose in Life test
The Purpose in Life test is a 20 item measure of experiencing meaning and purpose in one's life, with each item assessed on a 1 (lack of meaning) to 7 (full of meaning) Likert-type scale. The Purpose in Life test will be administered once at baseline, and at follow-up months 6, 12, 18, 24, 30, and 36. Higher scores indicate more meaning and purpose in life.