Efficacy of a Web-Based Alcohol Intervention for High School Students

Frequency of Alcohol Use

时间窗: Baseline, 1 month follow-up, and 6-month follow up

Quantity ⁄Frequency ⁄Peak Questionnaire Frequency of alcohol use was assessed with the question "How often do you use alcohol?" with responses provided on an 8-point Likert scale with options ranging from "0" to "7" ("Do not drink alcohol" to "Every day"). Items were reverse scores so higher scores represent higher levels of drinking frequency. Minimum = 0; Maximum = 7 Sample score range: Minimum = 0; Maximum = 7 Higher scores are worse outcomes

Weekly Drinking

时间窗: Baseline, 1 month follow-up, and 6-month follow up

Daily Drinking Questionnaire Weekly drinking was assessed with the question "Given that it is a typical week, please write the number of drinks you probably would have each day." A response scale is provided for each day of the week (e.g., Monday__, Tuesday__, etc.)." Weekly drinking was calculated by combining the reports for the seven days of the week (sum of the 7 days). Minimum = 0; Maximum = none Sample score range: Minimum = 0; Maximum = 26 Higher scores are worse outcomes

Peak Drinking Quantity

时间窗: Baseline, 1 month follow-up, and 6-month follow up

Quantity ⁄Frequency ⁄Peak Questionnaire Peak drinking quantity was assessed with the question "What is the most number of drinks that you have consumed on any given night in the past month?" Minimum = 0; Maximum = none Sample score range: Minimum = 0; Maximum = 25 Higher scores are worse outcomes

Heavy Episodic Drinking

时间窗: Baseline, 1 month follow-up, and 6-month follow up

Heavy Episodic Drinking is defined as having 5 or more drinks in a row for males and 3 or more for females in a 2 hour period in the past month. The number of drinks was based on research by Donovan (2009) establishing cut-points for children and adolescents. Participants were asked: "Males: Think back over the last two weeks. How many times have you had 5 or more drinks in a two hour period?" "Females: Think back over the last two weeks. How many times have you had 3 or more drinks in a two hour period?" Minimum = 0; Maximum = none Sample score range: Minimum = 0; Maximum = .76 Higher scores are worse outcomes

Blood Alcohol Concentration

时间窗: Baseline, 1 month follow-up, and 6-month follow up

Blood alcohol concentration was calculated using the Widmark Formula (1932/1981); BAC = \[Alcohol consumed in grams / (Body weight in grams x r)\] x 100. In this formula, "r" is the gender constant. Minimum = 0; Maximum = none Sample score range: Minimum = 0; Maximum = .62 Higher scores are worse outcomes