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Increasing Household Purchase and Child Consumption of Calcium Products

3 mai 2018 mis à jour par: Mary Jung, University of British Columbia

Increasing Household Purchase and Child Consumption of Calcium Products: A Randomised Controlled Trial

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:

  1. Parents in the experimental condition will purchase more calcium-rich products as compared to parents in the control condition.
  2. Parents and children in the experimental condition will consume more calcium rich products as compared to parents and children in the control condition.
  3. 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.
  4. 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.
  5. Perceived social support and role modelling behaviour will be highest in parents in the experimental condition as compared to parents in the control condition.
  6. Self-regulatory efficacy and outcome expectancies will mediate the changes in calcium-rich product purchases and consumption.

Aperçu de l'étude

Statut

Complété

Les conditions

Intervention / Traitement

Type d'étude

Interventionnel

Inscription (Réel)

189

Phase

  • N'est pas applicable

Contacts et emplacements

Cette section fournit les coordonnées de ceux qui mènent l'étude et des informations sur le lieu où cette étude est menée.

Lieux d'étude

  • Canada
    • British Columbia
      • Kelowna, British Columbia, Canada, V1V 1V7
        • Health and Exercise Psychology Laboratory

Critères de participation

Les chercheurs recherchent des personnes qui correspondent à une certaine description, appelée critères d'éligibilité. Certains exemples de ces critères sont l'état de santé général d'une personne ou des traitements antérieurs.

Critère d'éligibilité

Âges éligibles pour étudier

  • Enfant
  • Adulte
  • Adulte plus âgé

Accepte les volontaires sains

Oui

Sexes éligibles pour l'étude

Tout

La description

Inclusion Criteria:

  • 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

Exclusion Criteria:

  • Dietary restrictions, allergies, or medical reasons for limiting intake of dairy products

Plan d'étude

Cette section fournit des détails sur le plan d'étude, y compris la façon dont l'étude est conçue et ce que l'étude mesure.

Comment l'étude est-elle conçue ?

Détails de conception

  • Objectif principal: Soins de soutien
  • Répartition: Randomisé
  • Modèle interventionnel: Affectation parallèle
  • Masquage: Seul

Armes et Interventions

Groupe de participants / Bras
Intervention / Traitement
Expérimental: 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.
Comportemental: Mail-out hard copy materials (education plus self-regulatory strategies examples)
Comparateur actif: 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.
Comportemental: Soins standards

Que mesure l'étude ?

Principaux critères de jugement

Mesure des résultats
Description de la mesure
Délai
Changes in Purchasing Behaviour
Délai: 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.
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 Adult Consumption Behaviour
Délai: 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.
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 Child Consumption Behaviour
Délai: 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.
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)

Mesures de résultats secondaires

Mesure des résultats
Description de la mesure
Délai
Changes in Outcome Expectations
Délai: 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)
A total of 21 outcomes will be assessed in relation to expected outcomes of consuming adequate calcium for the parent and 8 outcomes in relation to expected outcomes of the parents child consuming adequate calcium. Outcomes are scored on a scale from 0 (very unlikely) to 9 (very likely).
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
Délai: 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)
Distinct components of self-regulatory efficacy include confidence in one's ability to schedule, goal set, and overcome barriers to purchasing and consuming calcium-rich products. A total of 11 items will be assessed and the items will be scored on a scale from 0% (Not at all confident) to 100% (Extremely confident).
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
Délai: 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 degree to which parents perceive themselves as offering support to their child in regards to consumption of calcium-rich products will be assessed using an adapted version of the Social Support for Diet Survey (Sallis et al., 1987). Questions will be adapted to pertain to the child's specific consumption of calcium-rich products.
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
Délai: 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 degree to which parents perceive themselves as role modelling consumption of calcium-rich products will be assessed using an adapted version of Cullen and colleagues (2001) family and peer influences on fruit, juice and vegetable consumption. This measure was adapted in a similar way to the current study by Draxten and colleagues (2014).
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)

Collaborateurs et enquêteurs

C'est ici que vous trouverez les personnes et les organisations impliquées dans cette étude.

Parrainer

University of British Columbia

Dates d'enregistrement des études

Ces dates suivent la progression des dossiers d'étude et des soumissions de résultats sommaires à ClinicalTrials.gov. Les dossiers d'étude et les résultats rapportés sont examinés par la Bibliothèque nationale de médecine (NLM) pour s'assurer qu'ils répondent à des normes de contrôle de qualité spécifiques avant d'être publiés sur le site Web public.

Dates principales de l'étude

Début de l'étude

1 août 2015

Achèvement primaire (Réel)

1 mars 2017

Achèvement de l'étude (Réel)

31 mars 2017

Dates d'inscription aux études

Première soumission

27 octobre 2015

Première soumission répondant aux critères de contrôle qualité

27 octobre 2015

Première publication (Estimation)

29 octobre 2015

Mises à jour des dossiers d'étude

Dernière mise à jour publiée (Réel)

9 mai 2018

Dernière mise à jour soumise répondant aux critères de contrôle qualité

3 mai 2018

Dernière vérification

1 mai 2018

Plus d'information

Termes liés à cette étude

Autres numéros d'identification d'étude

  • H14-02762

Ces informations ont été extraites directement du site Web clinicaltrials.gov sans aucune modification. Si vous avez des demandes de modification, de suppression ou de mise à jour des détails de votre étude, veuillez contacter register@clinicaltrials.gov. Dès qu'un changement est mis en œuvre sur clinicaltrials.gov, il sera également mis à jour automatiquement sur notre site Web .

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