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Increasing Household Purchase and Child Consumption of Calcium Products

3. maj 2018 opdateret af: 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.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

189

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

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

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Barn
  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ja

Køn, der er berettiget til at studere

Alle

Beskrivelse

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

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Støttende pleje
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Enkelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: 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.
Adfærdsmæssigt: Mail-out hard copy materials (education plus self-regulatory strategies examples)
Aktiv komparator: 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.
Adfærdsmæssigt: Standardpleje

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Changes in Purchasing Behaviour
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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)

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Changes in Outcome Expectations
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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)

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

University of British Columbia

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart

1. august 2015

Primær færdiggørelse (Faktiske)

1. marts 2017

Studieafslutning (Faktiske)

31. marts 2017

Datoer for studieregistrering

Først indsendt

27. oktober 2015

Først indsendt, der opfyldte QC-kriterier

27. oktober 2015

Først opslået (Skøn)

29. oktober 2015

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

9. maj 2018

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

3. maj 2018

Sidst verificeret

1. maj 2018

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • H14-02762

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

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