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The Effect of Proximity on Flu-Shot Participation

Information source: National Bureau of Economic Research, Inc.
ClinicalTrials.gov processed this data on August 20, 2015
Link to the current ClinicalTrials.gov record.

Condition(s) targeted: Influenza; Human

Intervention: The effect of proximity on flu shot participation (Other)

Phase: N/A

Status: Completed

Sponsored by: National Bureau of Economic Research, Inc.

Official(s) and/or principal investigator(s):
David I Laibson, Ph.D., Principal Investigator, Affiliation: National Bureau of Economic Research, Harvard University


The aim of this project is to investigate whether the proximity of employees to flu-shot clinics will increase the uptake rates of employees participating in these clinics. The investigators hypothesize that ease of access is an important factor in whether or not employees receive an influenza vaccination.

Clinical Details

Official title: The Effect of Proximity on Flu-Shot Participation

Study design: Endpoint Classification: Efficacy Study, Intervention Model: Single Group Assignment, Masking: Single Blind (Subject), Primary Purpose: Health Services Research

Primary outcome: Receipt of influenza vaccine

Secondary outcome:


Demographic characteristics on flu shot participation

Detailed description: In 2010, flu shots were provided to our partner company's headquarters in their second headquarters building (H2) in an obscure conference room. The investigators are proposing to move the flu shot clinic to a high traffic area, near a café in H2. The location of the flu shot clinic will be prominent and employees would pass by the flu shot clinic several times a day. Two weeks after the flu shot clinic in H2, the investigators will have a two day flu shot clinic in the first headquarters building (H1), near a highly traveled cafĂ© in H1. Our partner company will not tell employees that there will be a flu shot clinic in H1 until after the flu shot clinic ends in H2. The unexpected factor of the flu shot clinic in H1 will be used to test H2's location versus H1's location without the bias of having employees wait or procrastinate to choose one location over another. The two locations will allow us to identify whether moving from one convenient location to another, even more convenient location would make a significant difference in participation rates.


Minimum age: 18 Years. Maximum age: N/A. Gender(s): Both.


Inclusion Criteria:

- Employee of Express Scripts.

- Eligible to receive a flu shot at Express Scripts.

- Over 18 years of age.

Exclusion Criteria:

- Children

- Non Express Scripts employees

Locations and Contacts

Express Scripts, St. Louis, Missouri 63121, United States
Additional Information

Starting date: October 2011
Last updated: May 16, 2012

Page last updated: August 20, 2015

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