Normalization of Alcohol Drinking Due to Exposure to Alcohol Marketing in Young Adults: a Prospective Randomised Controlled Trial (RCT) With Ecological Momentary Assessment (EMA)
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 371
- 试验地点
- 2
- 主要终点
- Negative expectancy of drinking
研究概览
简要总结
This proposed study aims to evaluate incentive strategies on compliance rate of EMA, assess young adults' exposure to alcohol marketing, and its effect on receptivity outcomes, belief in normalization of alcohol drinking and alcohol consumption. The objectives are:
- To compare the compliance rate of EMA between participants receiving one-off bonus and incremental incentive and receiving incremental incentive only.
- To assess the association between exposure to alcohol marketing and drinking normalization, in terms of perceived popularity (descriptive norm), perceived social approval (injunctive norm) and positive expectancy.
- To assess the association between exposure to alcohol marketing and alcohol consumption.
- To assess the association between exposure frequency and receptivity to alcohol marketing.
- To assess the association between receptivity to alcohol marketing and drinking normalization.
- To assess the association between receptivity to alcohol marketing and alcohol consumption.
- To explore factor structure of perceived popularity (descriptive norm), perceived social approval (injunctive norm) and positive expectancy.
- To analyse drinking normalization effect in mediating the association between exposure to alcohol marketing, and alcohol consumption, and between receptivity and alcohol consumption.
详细描述
Study design
The proposed project is a combination of (1) a time-based system-triggered EMA, which will collect real-time exposure to alcohol advertisements and marketing, and (2) a longitudinal RCT of incentive strategies survey in current alcohol users. The participants will first complete a baseline questionnaire and then participate in EMA via a smartphone application (App) for 21 consecutive days. This assessment length was designed to capture participants' exposure to alcohol marketing for a long period of time. The EMA will include questions about self-reported exposure to and /or responses to alcohol marketing. One month after completing the EMA, participants will be contacted to complete a telephone follow-up survey. (The one-month follow-up shall understand participants' perception and receptivity of alcohol marketing and drinking behavior due to alcohol marketing exposure and alcohol consumption.)
Subjects
The investigators will recruit 360 participants with the following inclusion criteria: (1) aged between 18 and 35 years, (2) own a mobile smartphone with internet access, (3) drank any alcohol in past 30 days (current drinkers), (4) will be in Hong Kong during the 3-week EMA study period, and (5) able to read and write in Chinese.
Procedures
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 35 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Own a mobile smartphone with internet access
- •Drank any alcohol in past 30 days (current drinkers)
- •Will be in Hong Kong during the 3-week EMA study period
- •Able to read and write in Chinese.
排除标准
- •Did not drink any alcohol in the past 30 days
- •Will not be in Hong Kong during the study period
结局指标
主要结局
Negative expectancy of drinking
时间窗: Baseline and 1-month follow-up
Participants will be asked 18 items to rate their extent of agreement (from 1: disagree to 4: agree) with various views on alcohol drinking. Such as "I would be clumsy",
Receptivity to alcohol marketing
时间窗: 3-week EMA period
In each reported exposure in EMA, participants will be asked to rate five statements to examine their receptivity to alcohol marketing. The five sentences are as follows: (1) I like the ad; (2) I feel the main actors in the ads are attractive; (3) I feel the ad is creative; (4) the ad content/branding suits my personal image/status; and (5) drinking is portrayed as a positive behavior. These items will be rated on a 5-point Likert scale from 1 (strongly disagree) to 5 (strongly agree).
Perceived social approval of drinking
时间窗: Baseline and 1-month follow-up
Participants will be asked to rate the extent they agree (from 1: strongly disagree to 5: strongly agree) with various views on alcohol drinking. such as "I accept myself to drink in public occasions".
Compliance rate of EMA questionnaires
时间窗: 3-week EMA period
All participant will be asked to answer the EMA questionnaires 3 times per day for consecutively 21 days. For each EMA survey, participants will have 30 mins to complete it. The compliance rate will be calculated by total number of completed EMA surveys divided by total numbers of EMA surveys (total n=63 surveys, 21 days × 3 surveys/day).
Exposure frequency to alcohol marketing
时间窗: 3-week EMA period
In each EMA prompt, participants will be asked whether they have seen any alcohol marketing in the past 5 hours (except for the first EMA survey of the day, which asks about the period starting from the last EMA on the previous day rather than the past 5 hours), the channels of exposure, and types of alcoholic beverages.
Perceived popularity of drinking
时间窗: Baseline and 1-month follow-up
Subjects will be asked to respond to some statements with various views on alcohol drinking. such as "Out of 10, how many drinkers do you think in your peers in Hong Kong?" (0-10 points, 0=not at all common, 10=very common).
Positive expectancy of drinking
时间窗: Baseline and 1-month follow-up
Participants will be asked 20 items to rate their extent of agreement (from 1: disagree to 4: agree) with various views on alcohol drinking. Such as "I would act sociable",
次要结局
- Auxiliary outcome(1-month follow-up)
- Frequency of drunk(Baseline and 1-month follow-up)
- Alcohol consumption(Baseline, 1-month follow-up and 3-week EMA period)
研究者
Dr. Derek Yee-Tak Cheung
Assistant Professor
The University of Hong Kong