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Brief Interventions to Increase HPV Vaccine Acceptance in School-based Health Centers

6 februari 2014 uppdaterad av: Vaughn Rickert, Indiana University

Brief Interventions to Increase HPV Vaccine Acceptance in School-based Health Centers in Adolescents

Using health behavior theories and theories related to the effects of persuasive messages (i.e., inoculation theory), we plan to: 1. Systematically test the effects of brief persuasive message interventions on receipt of the first dose of HPV vaccine; and 2. evaluate the effects of the interventions on followup with subsequent doses of vaccine (using reminder notices with persuasive message content). One set of interventions will involve a comparison of a 1 sided message, which only emphasizes the positive aspects of a recommended behavior, with a 2 sided message, which presents negative aspects of the behavior followed by positive counterarguments. A second set of interventions will involve a test of a social compliance (foot-in-the-door technique, in which half of the parent participants will be asked to respond to a high compliance request (i.e., a request likely to generate high compliance, such as, "Do you want to protect your daughter from cancer? or for male children, "Do you want to protect your son from genital warts?"before subsequently being asked about actually having their adolescents vaccinated. The other half of the parents will not receive a high compliance request. Parents of 11-14 year old adolescents will be randomized to the two sets of interventions, resulting in a 2 X 2 design: message sidedness (1 sided; 2 sided) and social compliance request (yes; no). The specific aims of this proposal are to evaluate the 1) efficacy of 2 sided vs. 1 sided messages on rates of HPV vaccination; 2) the efficacy of a social compliance intervention on rates of HPV vaccination; and 3) potential moderators and mediators of message effect on vaccine acceptance.

Studieöversikt

Status

Okänd

Betingelser

Intervention / Behandling

Detaljerad beskrivning

The proposed study will employ a randomized, full factorial experimental design to examine the effects of brief message interventions on parents' acceptance of the first dose of HPV vaccine for their adolescents aged 11-14 years, as well as follow through with subsequent doses. Specifically, the study will employ a 2 x 2 experimental design, in which participants will be assigned randomly to one of two different message sidedness conditions (1 sided vs. 2 sided) and two social compliance conditions (high compliance request [HCR] vs. noHCR). The interventions will be administered by a bilingual research assistant who will read, verbatim, scripts provided to them. Computer assisted telephone interview (CATI) will be used to gather demographic and background information as well as parental health beliefs regarding preexisting worries about HPV vaccine leading to safety concerns (moderator variable) prior to administration of the interventions. After the interventions, additional health beliefs will be assessed (mediators).

  1. A greater proportion of girls as compared to boys will receive a first dose of vaccine.
  2. Among both girls and boys who receive a first dose of Gardasil™, no differences in completion rates will be detected.
  3. The social compliance intervention to be more effective with parents of girls as compared to parents of boys. This prediction of a differential effect is based on the fact that cervical cancer will be seen as a more serious and less stigmatizing condition than genital warts.

In summary, the implementation of this protocol will allow us to systematically examine the use of two different interventions on parents of both boys and girls. Thus, parents (n=800) of 11-14 year old girls and boys will be randomized to the two sets of interventions, resulting in a 2 X 2 design: message sidedness (1-sided; 2-sided) and HCR (yes; no).

Studietyp

Interventionell

Inskrivning (Förväntat)

600

Fas

  • Inte tillämpbar

Kontakter och platser

Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.

Studieorter

  • Förenta staterna
    • Texas
      • Galveston, Texas, Förenta staterna, 77550
        • Teen Health Centers

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

11 år till 15 år (Barn)

Tar emot friska volontärer

Ja

Kön som är behöriga för studier

Allt

Beskrivning

Inclusion Criteria:

  • The parents of adolescent males and females (aged 11-14 years) who have provided written consent for their adolescent to receive health care services through the Teen Health Center, Inc, a nonprofit organization that works in collaboration with the Department of Pediatrics at the University of Texas Medical Branch, Galveston, Texas and whose adolescents have not received their first dose of HPV vaccine, will be eligible to participate.

Exclusion Criteria:

  • Having received one or more doses of the HPV vaccine Gardasil

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

  • Primärt syfte: Behandling
  • Tilldelning: Randomiserad
  • Interventionsmodell: Faktoriell uppgift
  • Maskning: Ingen (Open Label)

Vapen och interventioner

Deltagargrupp / Arm
Intervention / Behandling
Experimentell: Compliance
Parents will be randomized to receive high or no compliance condition where those in the experimental group will be asked about whether or not they will protect their daughter from cervical cancer or for males, their son from genital warts.
Beteende: Compliance
Parent will either receive a high or no compliance condition where each is asked to endorse the importance of prevention cervical cancer or genital warts depending on their teen's gender.
Experimentell: Message sidedness
Parents will be given either a one-sided verbal message or a two-sided verbal message about the HPV vaccine.
Beteende: Message sidedness
Parent will receive either a one-sided or two-sided message about the HPV vaccine

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Gardasil immunization
Tidsram: One year
Parent signs vaccine information sheet and returns to school-based health center. Adolescent is vaccinated with first dose of Gardasil by licensed health care professional.
One year

Sekundära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Completion of three dose series of Gardasil
Tidsram: Three years
We will identify all enrolled parents to determine whether their adolescent received all three required Gardasil immunization across a three year period.
Three years
Message type
Tidsram: Two years
Determine whether the type of message delivered to parent, i.e., one-sided or two-sided, increases the number of first dose immunizations.
Two years
Gender
Tidsram: One year
Determine if there are gender differences between male and female children relative to first dose administration
One year

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Sponsor

Indiana University

Samarbetspartners

Merck Sharp & Dohme LLC

Utredare

  • Huvudutredare: Vaughn I Rickert, PsyD, Indiana University School of Medicine

Publikationer och användbara länkar

Den som ansvarar för att lägga in information om studien tillhandahåller frivilligt dessa publikationer. Dessa kan handla om allt som har med studien att göra.

Allmänna publikationer

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart

1 september 2010

Primärt slutförande (Förväntat)

1 juni 2014

Avslutad studie (Förväntat)

1 juni 2014

Studieregistreringsdatum

Först inskickad

2 februari 2009

Först inskickad som uppfyllde QC-kriterierna

15 mars 2010

Första postat (Uppskatta)

16 mars 2010

Uppdateringar av studier

Senaste uppdatering publicerad (Uppskatta)

10 februari 2014

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

6 februari 2014

Senast verifierad

1 februari 2014

Mer information

Termer relaterade till denna studie

Nyckelord

Ytterligare relevanta MeSH-villkor

Andra studie-ID-nummer

  • 0911-50

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