Knowledge, Attitudes and Practices on Fad Diets of a Panel of Spanish Consumers: Protocol of a Cross-sectional Study
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 2,604
- 试验地点
- 1
- 主要终点
- Score indicator of Attitudes
研究概览
简要总结
Introduction: excess body weight is a growing and underestimated problem recognized as a worldwide epidemic. The collective difficulty and frustration to achieve healthy lifestyles, has caused the emergence of the named fad diets. In addition to the uncertainties of efficacy and safety of this diets, there is a lack of research to help establish the scope of the problem, and the knowledge, attitudes and practices of the general population.
Objective: to assess the level of knowledge, attitudes (positive and negative) and practices on fad diets in a panel of consumers of socio-demographic characteristics assimilated to the Spanish population.
Methods: cross-sectional descriptive study through non-validated and self-administered online Knowledge, Attitudes and Practices survey (KAP survey), on a sample of 2 600 adult consumers (non-probabilistic quota sampling). Primary outcomes: knowledge, attitudes and practices on fad diets. Data analysis: the association of each outcome with sociodemographic and socio-economic data will be assessed, and the differences between calculated scores as well as trends in different domains according to age, educational level and income level will be assessed (point estimates and confidence intervals 95%).
详细描述
Sample size: The sample size is estimated at 2 600 for a confidence level of 95%, a power of 80% and taking into account a response rate of 60-70% and a percentage of losses (people who accept the invitation but do not complete the survey) of 10%.
Aditional processess: the preselected subjects will be sent an invitation to participate in the study and will require a web record where basic sociodemographic data will be collected. The subjects will receive an incentive to join the study that will consist of points redeemable for gifts, the number of points received being proportional to the length and complexity of the final survey. The initial invitation does not contain information on the type of survey or incentive, but the estimated time for completion. During the recruitment process, basic socio-demographic data will be reviewed to ensure that stratification criteria are met and duplicate cases will be eliminated.
Intruments (KAP survey): survey of Knowledge, Attitudes and Practices , built ad hoc, not validated, online and self-administered. The survey will include the 3 domains that should be evaluated: knowledge, attitudes and practices, and will have a total of no more than 18 questions, according to recommendations established in literature. The recommended stages will be followed for the creation of the KAP survey:
- definition of the objective, target population and survey modules
- determine the topics to be covered that will be translated into necessary modules
- set questions that cover the topics
- select and prioritize the questions that will finally be part. To do so, each question will be categorized into: (a) essential questions; (b) optional questions; (c) specific questions, must have a specific objective assigned and explain the importance of it.
- adapt the questions to be a self-administered online questionnaire
- There will be a pilot period for both the content and its online functional viability of the survey.
To assess knowledge, categorized questions will be created, which will consist of a list of response options considered correct and not correct, which will include the answers "others" and "I don't know". The evaluators will determine whether the topic is "Know" or "Don't Know", as well as the number of correct/incorrect answers.
研究设计
- 研究类型
- Observational
- 观察模型
- Other
- 时间视角
- Cross Sectional
入排标准
- 年龄范围
- 18 Years 至 65 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •age between 18-65 years old
- •male/Female
- •spanish Nationality
- •be a consumer of an audited and verified internet portal
排除标准
- •age out of the range
- •be of a different nationality than the Spanish
- •be an internet consumer of an unaudited portal
结局指标
主要结局
Score indicator of Attitudes
时间窗: 1 month
The attitudes domain are emotions, motivations, perceptions and beliefs that respondent positively or negatively perceives to adopt or not a given fad diet. Attitudes will be measured through a module of a KAP survey (Knowledge, Attitudes and Practices survey; http://www.fao.org/3/a-i3545e.pdf) by up to 8 key three-point likert scales questions. The following specific subdomains will be assessed: (a) attitudes about negative impact of fad diets: perceived susceptibility and severity; (b) Attitudes about whether or not following a given fad diet and / or official dietary guidelines: benefits and barriers perceived, self-confidence, preparation for change. Questions in this modules will be developed based on the Health Belief Model. Surveyor will be able to establish the intensity of respondents' attitudes towards fad diets, and a score of attitudes can be estimated as follows: sum of total respondents score / Total number of respondents
Indicator of Practices
时间窗: 1 month
Indicator of Practices: The practices domain are observable actions of an individual which are associated with the follow-up of fad diets. Practices will be measured through a module of a KAP survey (Knowledge, Attitudes and Practices survey; http://www.fao.org/3/a-i3545e.pdf) by up to 8 key yes/no questions. Practice questions will be related to follow-up or not of a fad diet, the positive or negative impact perceived or the number of diets followed. Surveyor will be able to establish the overall intensity of respondents' practices towards fad diets.
Score indicator of Knowledge
时间窗: 1 month
The knowledge domain is the individual understanding about fad diets and will be measured through a module of a KAP survey (Knowledge, Attitudes and Practices survey; http://www.fao.org/3/a-i3545e.pdf) by up to 8 key categorized questions that would adress this domain. Knowledge questions may have a single or several answers. The key questions will be related to the knowledge about definition, kind of popular diets , health impact and others side effects, potential effectiveness, etc. The surveyor will be able to establish if the surveyed "Knows" or "Does not knows" and the "number of correct answers" for every question. A Score of knowledge can be estimated as follows: sum of correct/knows responses given by all respondents / Total number of respondents.
次要结局
未报告次要终点