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Nudging for Vaccination : Efficacity and Acceptability Among Medical Students

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT03768596
Recruitment Status : Completed
First Posted : December 7, 2018
Last Update Posted : January 10, 2019
Université de Nice Sophia Antipolis
Information provided by (Responsible Party):
Adriaan Barbaroux, Barbaroux, Adriaan, M.D.

Brief Summary:

Nudge is a set of methods aimed at helping people adopt a behavior by a gentle prompt, conscious or not. Classically, Nudges rely on heuristics and cognitive biases. These methods have been studied for years in social psychology and are receiving renewed attention since the awarding of the Nobel Prize in economics to Richard Thaler for his work on the application of Nudge to the economy.

Health professionals are very inadequately vaccinated (25 to 45% of the population). Some studies have shown that a Nudge based on intent implementation can significantly increase vaccination coverage. However, few studies evaluate the acceptability of Nudge or its application to health professionals.

The investigators sought to apply a Nudge based on availability heuristics to health professionals, in order to evaluate its effectiveness and terms of behavior adoption (influenza vaccination) and its acceptability.

The investigator's hypothesis is that Nudging is both effective and acceptable and that people found nudging more acceptable if they have been exposed to a nudge.

Condition or disease Intervention/treatment Phase
Influenza, Human Vaccination; Sepsis Behavioral: Nudge Other: vaccination form Not Applicable

Detailed Description:

The investigators asked residents in general medicine to pass a questionnaire including a Nudge. This Nudge was the influenza vaccine prescription form accompanied on the back of the telephone numbers of the occupational health centers of the hospitals where residents were on probation.

The interns of the group "Nudge" saw at the end of their questionnaire the following statement: "If you are not vaccinated against the flu so far, you can get the form stapled to this questionnaire, it will allow you to get the vaccine in pharmacy. On the back you will also find practical information about immunization services at your place of training. " A group will receive an implemented Nudge questionnaire, a group will receive a questionnaire without Nudge and a control group will not be asked. (Phase 1) The 3 groups will receive a month later a questionnaire evaluating the effectiveness in terms of immunization coverage, and the acceptability of the Nudge, for oneself and for others. (Phase 2) The control group will only receive the Phase 2 questionnaire to control the Hawthorne effect.

The difference between the 3 groups will consist exclusively in the exposure of the participants to:

  • A questionnaire on their attitude (opinion) towards vaccination;
  • The numbers of the occupational health vaccination centers of their places of training;
  • The flu vaccine prescription form, to be signed and stamped by a doctor (also already freely available on the internet)

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 200 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Intervention Model Description: one group receives a form with the nudge, one group receives the same form without nudge and another group doesn't receive any form
Masking: None (Open Label)
Masking Description: In the first pat of the study, participants are unaware of the fact we are trying to nudge them. In the second part, they are explained and asked what they feel about nudging
Primary Purpose: Basic Science
Official Title: Nudging for Vaccination : Efficacity and Acceptability Among Medical Students
Actual Study Start Date : November 7, 2018
Actual Primary Completion Date : December 20, 2018
Actual Study Completion Date : December 20, 2018

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Flu

Arm Intervention/treatment
Experimental: Nudge
receiving nudge and form
Behavioral: Nudge
Influenza Vaccine Prescription Form accompanied on the back of telephone numbers of occupational health centers of different hospitals where interns are likely to be on probation.

Other: vaccination form
a form about vaccination

Active Comparator: No nudge
receiving the same form without nudge (only questions about their opinion/attitudes about vaccination)
Other: vaccination form
a form about vaccination

No Intervention: No intervention
receiving no nudge nor form

Primary Outcome Measures :
  1. Efficiency: vaccination rate [ Time Frame: 1 month ]
    vaccination rate

Secondary Outcome Measures :
  1. acceptability: scale [ Time Frame: One month ]
    likert based acceptability form

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   Child, Adult, Older Adult
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • medical students

Exclusion Criteria:

  • none

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT03768596

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Nice, France, 06000
Sponsors and Collaborators
Adriaan Barbaroux
Université de Nice Sophia Antipolis
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Study Chair: Isabelle MILHABET, MD, PhD LAPCOS-UCA
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Responsible Party: Adriaan Barbaroux, Principal Investigator, Barbaroux, Adriaan, M.D. Identifier: NCT03768596    
Other Study ID Numbers: ABarbaroux
2018-A02939-46 ( Other Identifier: ID RCB )
First Posted: December 7, 2018    Key Record Dates
Last Update Posted: January 10, 2019
Last Verified: January 2019
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Yes
Plan Description: all IPD that underlie results in a publication
Supporting Materials: Study Protocol
Statistical Analysis Plan (SAP)
Clinical Study Report (CSR)
Time Frame: starting 6 months after publication
Access Criteria: OK for meta analysis, please contact directly Dr Adriaan BARBAROUX.

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by Adriaan Barbaroux, Barbaroux, Adriaan, M.D.:
Additional relevant MeSH terms:
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Influenza, Human
Orthomyxoviridae Infections
RNA Virus Infections
Virus Diseases
Respiratory Tract Infections
Respiratory Tract Diseases
Immunologic Factors
Physiological Effects of Drugs