Using purity based messages to increase intention to receive the HPV vaccine

HPV, genital warts, and purity: A 2x2 study of college-aged individuals’ perceptions of HPV and intention to receive the HPV vaccine

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN51541314

Enrollment

2556

Registered

2020-08-12

Start date

2020-08-12

Completion date

Unknown

Last updated

2020-09-28

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Sexually transmitted disease awareness Infections and Infestations

Interventions

Participants will be randomized using a Qualtrics algorithm. The algorithm randomly presents either the control statement, the control statement + control image, experimental statement, or experimenta

Eligibility

Sex/Gender

All

Inclusion criteria

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

Exclusion criteria

Exclusion criteria: 1. Has completed the HPV vaccine series (3 or more doses) 2. Has already completed the survey

Design outcomes

Primary

Measure	Time frame
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

Measure	Time frame
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	—

Countries

United States of America

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026