Using purity based messages to increase intention to receive the HPV vaccine
| ISRCTN | ISRCTN51541314 |
|---|---|
| DOI | https://doi.org/10.1186/ISRCTN51541314 |
| Secondary identifying numbers | IRB2000027459 |
- Submission date
- 10/08/2020
- Registration date
- 12/08/2020
- Last edited
- 18/09/2020
- Recruitment status
- No longer recruiting
- Overall study status
- Completed
- Condition category
- Infections and Infestations
Plain English summary of protocol
Background and study aims
HPV is the name of a very common group of viruses. They do not cause any problems in most people, but some types can cause genital warts or cancer. HPV affects the skin. There are more than 100 different types.
High vaccination rates for human papillomavirus (HPV) are key to decreasing the burden of HPV-related diseases. Most messages that promote HPV vaccination to college-aged individuals focus on the long-term consequences of HPV infection. Messages that focus more on short-term consequences of HPV infection and include imagery may be more effective in this age group. The aim of this study is to see if a message focusing more on the short-term consequences of HPV infection, like genital warts, might increase a person’s intent to receive the HPV vaccine.
Who can participate?
Anyone who is between 18 and 23 years of age, lives in the United States, and has not completed the HPV vaccine series
What does the study involve?
Participation involves completing a short survey (5-10 minutes), viewing of a message, and then completing another survey (10-15 minutes). Participants are randomly allocated to view 1) CDC HPV description (control) or 2) CDC HPV description with HPV vaccine dose image (image control) 3) purity- and disgust-themed narrative about an HPV infection on a Tinder date 4) purity- and disgust-themed narrative about an HPV infection on a Tinder date with images. Intent to receive the HPV vaccine is measured using a survey immediately after the message has been reviewed by the participant.
What are the possible benefits and risks of participating?
The study is not intended to directly benefit participants. The risks in the study are likely to be small. There is a possibility of viewing images of a graphic nature, which some people may find disturbing. There is always a small chance that confidentiality will be broken despite extensive procedures to preserve confidentiality.
Where is the study run from?
The study is being run from Yale University (USA), but all study procedures (questionnaires and messages) take place online.
When is the study starting and how long is it expected to run for?
June 2017 to October 2020
Who is funding the study?
Yale University (USA)
Who is the main contact?
Erin James
erin.james@yale.edu
Contact information
Scientific
One Church St
Suite 340
New Haven
06510
United States of America
 ORCID ID |
0000-0003-0172-5292 |
|---|---|
| Phone | +1 (203) 432-5015 |
| erin.james@yale.edu |
Study information
| Study design | Interventional randomized controlled trial |
|---|---|
| Primary study design | Interventional |
| Secondary study design | Randomised controlled trial |
| Study setting(s) | Internet/virtual |
| Study type | Prevention |
| Participant information sheet | Not available in web format, please use the contact details below to request a patient information sheet |
| Scientific title | HPV, genital warts, and purity: A 2x2 study of college-aged individuals’ perceptions of HPV and intention to receive the HPV vaccine |
| Study objectives | Participants who read the interventional message will have a higher intent to receive HPV vaccine than participants who read the control message. |
| Ethics approval(s) | Approved 03/03/2020, Yale University Institutional Review Board (25 Science Park, 150 Munson St, 3rd Floor, New Haven, CT, 06511, USA; +1 203-785-4688; HRPP@yale.edu), ref: 2000027459 |
| Health condition(s) or problem(s) studied | Sexually transmitted disease awareness |
| Intervention | Participants will be randomized using a Qualtrics algorithm. The algorithm randomly presents either the control statement, the control statement + control image, experimental statement, or experimental statement + experimental image while ensuring that group numbers are approximately balanced between the 4 groups. This interventional study will randomize participants to receive either: Control: An adapted CDC statement on the HPV vaccine Control + Image: An adapted CDC statement on the HPV vaccine with an image of an HPV vaccine dose in a vial Intervention: a message containing a brief description of a Tinder date leading to HPV infection. Intervention + image: a visual message containing images of genital warts and a brief description of a Tinder date leading to HPV infection. Immediately after the intervention/control has been reviewed by the participant, intent to receive the HPV vaccine is measured once during a post-intervention survey. The method of measurement is a single question asking if the participants intend to initiate (if they have received 0 HPV vaccine doses) or continue (if they have received 1-2 HPV vaccine doses) the HPV vaccine series. |
| Intervention type | Behavioural |
| Primary outcome measure | Intent to receive the HPV vaccine, measured once during a post-intervention survey administered immediately after the visual message has been reviewed by the participant. (The method of measurement is a single question asking if the participants intend to initiate [if they have received 0 HPV vaccine doses) or continue (if they have received 1-2 HPV vaccine doses] the HPV vaccine series) |
| Secondary outcome measures | 1. Vaccine confidence as measured by the Vaccine Confidence Scale at post intervention 2. Purity/liberty measured using the moral foundations questionnaire before the intervention |
| Overall study start date | 01/09/2019 |
| Completion date | 20/10/2020 |
Eligibility
| Participant type(s) | Healthy volunteer |
|---|---|
| Age group | Adult |
| Lower age limit | 18 Years |
| Sex | Both |
| Target number of participants | 2,556 |
| Key inclusion criteria | 1. Between 18 and 23 years of age (inclusive) 2. Resident of the United States 3. Has received no more than 2 doses of the HPV vaccine |
| Key exclusion criteria | 1. Has completed the HPV vaccine series (3 or more doses) 2. Has already completed the survey |
| Date of first enrolment | 12/08/2020 |
| Date of final enrolment | 15/09/2020 |
Locations
Countries of recruitment
- United States of America
Study participating centre
Suite 340
New Haven
06510
United States of America
Sponsor information
University/education
333 Cedar St
New Haven
06510
United States of America
| Phone | +1 203 432 3656 |
|---|---|
| saad.omer@yale.edu | |
| Website | http://medicine.yale.edu/ |
Funders
Funder type
University/education
Private sector organisation / Universities (academic only)
- Alternative name(s)
- YSM
- Location
- United States of America
Results and Publications
| Intention to publish date | 30/09/2022 |
|---|---|
| Individual participant data (IPD) Intention to share | Yes |
| IPD sharing plan summary | Available on request |
| Publication and dissemination plan | The study protocol, which contains a brief analysis plan, will be made available. Planned publication of the study results in a high-impact, peer-reviewed journal. |
| IPD sharing plan | The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request. This includes de-identified individual participant data used to generate the results reported. The data will be available within one month of publication of the manuscript. After approval, data will be shared via a link (to be provided) and should only be used for the aims detailed in the approved proposals. |
Editorial Notes
18/09/2020: The overall trial end date has been changed from 15/09/2020 to 20/10/2020 and the plain English summary has been updated accordingly.
12/08/2020: Trial’s existence confirmed by Yale IRB.
