Increasing Household Purchase and Child Consumption of Calcium Products: A Randomised Controlled Trial
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 189
- 试验地点
- 2
- 主要终点
- Changes in Purchasing Behaviour
研究概览
简要总结
The objective of this research is to test the effectiveness of persuasive messages targeted at parents who have children who consume inadequate amounts of calcium. Specifically, the effectiveness of the intervention material on increase a) the purchase of calcium-rich products by parents, and b) the consumption of calcium-rich products in the parent and child will be examined in 400 families across Canada. Families will receive either the targeted intervention materials or standard of care generic nutrition materials retrieved from Health Canada's website. Materials will be delivered to parents during weeks 0, 8, 16, and 22 of the study. Monitoring of parents' calcium product purchases and consumption behaviour in both parents and children will occur at week 0,12, 24 weeks (immediately post-intervention) and at 52 weeks (i.e., 6-month follow-up). Purchases will be verified by grocery receipts made during the aforementioned weeks. Parents will self-report on their dietary consumption as well as their child's using a food frequency questionnaire. The study hypotheses are as follows:
- Parents in the experimental condition will purchase more calcium-rich products as compared to parents in the control condition.
- Parents and children in the experimental condition will consume more calcium rich products as compared to parents and children in the control condition.
- Perceived outcome expectancies of consuming calcium-rich products will increase to a greater extent in parents in the experimental condition as compared to parents in the control condition.
- Self-regulatory efficacy to consume calcium-rich products will increase to a greater extent in parents in the experimental condition as compared to parents in the control condition.
- Perceived social support and role modelling behaviour will be highest in parents in the experimental condition as compared to parents in the control condition.
- Self-regulatory efficacy and outcome expectancies will mediate the changes in calcium-rich product purchases and consumption.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Supportive Care
- 盲法
- Single (Participant)
入排标准
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Parent of a child between the ages of 4 and 10
- •The child consumes less than the recommended daily intake of calcium (1300mg for youth aged 9-10 and 1000mg for children aged 4-8)
- •Parent and child have no dietary restrictions, allergies, or medical reasons for limiting intake of dairy products
- •Parent can read and speak English
排除标准
- •Dietary restrictions, allergies, or medical reasons for limiting intake of dairy products
研究组 & 干预措施
Experimental
The experimental condition (EXP) will receive the targeted intervention material developed and designed by the researchers using focus group discussions with parents. This information will include salient benefits of the consumption of calcium-rich products. In addition, self-regulatory strategies will be provided to encourage purchasing and consumption of calcium-rich products and address any potential barriers to purchase and consumption. Material will sent on four different occasions via mail. At time one (week 0) participants will be sent a 13-month calendar, at time 2 (week 8) participants will be sent a grocery pad and a recipe book. At time 3 and 4 (week 16 and 22 respectively) participants will be sent a newsletter.
干预措施: Mail-out hard copy materials (education plus self-regulatory strategies examples) (Behavioral)
Standard Care
Individuals in the Control condition (CON) will receive general healthy eating materials including Canada's Food Guide, Healthier Grocery Shopping Guide and Cooking with Kids. Material will sent on four different occasions via mail. At time one (week 0) participants will be sent a 13-month calendar, at time 2 (week 8) participants will be sent a note pad and an activity book. At time 3 and 4 (week 16 and 22 respectively) participants will be sent a newsletter.
干预措施: Standard Care (Behavioral)
结局指标
主要结局
Changes in Purchasing Behaviour
时间窗: Baseline (before the intervention begins), week-12 (mid point of the intervention), week-24 (immediately after the intervention), week-52 (6-months after the intervention is complete)
The purchase of calcium-rich products will be assessed objectively via grocery receipts over a 7-day period.Receipts will be mailed to UBC Okanagan. Information provided within receipts will be entered into the ESHA nutrition analyses software. Specifically, changes in mg of calcium purchased will be examined over the above time points.
Changes in Adult Consumption Behaviour
时间窗: Baseline (before the intervention begins), week-12 (mid point of the intervention), week-24 (immediately after the intervention), week-52 (6-months after the intervention is complete)
Consumption of calcium by the parent be assessed using a 3-day food diary at baseline, week-12, week-24 and week-52. Data provided with the food diary will be entered into the ESHA nutrition analyses software and changes in mg of calcium consumed over time will be examined.
Changes in Child Consumption Behaviour
时间窗: Baseline (before the intervention begins), week-12 (mid point of the intervention), week-24 (immediately after the intervention), week-52 (6-months after the intervention is complete)
Consumption of calcium by the child be assessed using a 3-day food diary to be completed by the parent at baseline, week-12, week-24 and week-52. Data provided with the food diary will be entered into the ESHA nutrition analyses software and changes in mg of calcium consumed over time will be examined.
次要结局
- Changes in Outcome Expectations(Baseline (before the intervention begins), week-12 (mid point of the intervention), week-24 (immediately after the intervention), week-52 (6-months after the intervention is complete))
- Changes in Self-Regulatory Efficacy Beliefs(Baseline (before the intervention begins), week-12 (mid point of the intervention), week-24 (immediately after the intervention), week-52 (6-months after the intervention is complete))
- Changes in Parent Social Support(Baseline (before the intervention begins), week-12 (mid point of the intervention), week-24 (immediately after the intervention), week-52 (6-months after the intervention is complete))
- Changes in Perceived Role Modelling(Baseline (before the intervention begins), week-12 (mid point of the intervention), week-24 (immediately after the intervention), week-52 (6-months after the intervention is complete))
研究者
Mary Jung
Assistant Professor
University of British Columbia