ClinicalTrials.gov
ClinicalTrials.gov Menu

The Effect of Proximity on Flu-Shot Participation

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.
ClinicalTrials.gov Identifier: NCT01455753
Recruitment Status : Completed
First Posted : October 20, 2011
Last Update Posted : December 18, 2017
Sponsor:
Collaborator:
National Institute on Aging (NIA)
Information provided by (Responsible Party):
National Bureau of Economic Research, Inc.

Brief Summary:
Using desk location information and employees' building entry/exit swipe card data from a company that offered a free 2-day worksite influenza vaccination clinic, we separately identify the vaccination effects of base proximity—the inverse of walking distance between one's desk and the clinic—and functional proximity—the likelihood of passing near the clinic during the course of a normal work day (ie, days when the clinic is not open).

Condition or disease Intervention/treatment
Influenza Human Other: Functional Proximity Other: Base Proximity

Detailed Description:

We study the 2011 influenza vaccine uptake of employees at the headquarters of a health benefits administrator in the United States. These employees are generally not health care personnel. All of them have health insurance. Of the company's total workforce (including those not based at the headquarters), 26% are African Americans and 37% are racial minorities.

There are 2 main buildings at the company headquarters. Building One houses 520 employees and is the site of the vaccination clinic; Building Two houses 1281 employees. The 2 buildings are 131 meters apart and connected by an enclosed passageway. The clinic was located near the cafeteria in Building One and adjacent to the passageway connecting the 2 buildings. The clinic was conducted from October 19 to 20, 2011, and it was advertised during the 3 weeks prior.

The company requires employees to swipe a personalized electronic badge to open the external doors of its buildings, which include the doors to the passageway between the buildings. The company provided us data on the date and time of each swipe in September and October 2011. If an employee swipes her badge and holds the door open for another employee, we do not observe that other employee. The badge swipe data are therefore an incomplete measure of all movements between the buildings. The company also gave us data on employee characteristics and vaccination uptake, scaled architectural plans of the buildings, and employee desk maps.


Study Type : Observational
Actual Enrollment : 1801 participants
Observational Model: Other
Time Perspective: Retrospective
Official Title: The Effect of Proximity on Flu-Shot Participation
Study Start Date : October 2011
Actual Primary Completion Date : May 2012
Actual Study Completion Date : May 2012

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Flu Flu Shot

Group/Cohort Intervention/treatment
Employees
A total of 1,801 employees of a health benefits administrator that held a free workplace influenza vaccination clinic.
Other: Functional Proximity
Using each employee's building entry/exit swipe card data, we test whether functional proximity—the likelihood that the employee walks by the clinic for reasons other than vaccination—predicts whether the employee gets vaccinated at the clinic.

Other: Base Proximity
We also test whether base proximity—the inverse of walking distance from the employee's desk to the clinic—predicts vaccination probability.




Primary Outcome Measures :
  1. Receipt of influenza vaccine [ Time Frame: One week ]
    The investigators will measure whether proximity to a flu shot clinic effected whether an employee received an influenza vaccine.


Secondary Outcome Measures :
  1. Absenteeism [ Time Frame: The investigators will follow employees' absenteeism for five to six months ]
    The investigators will measure absenteeism in employees who received a flu shot versus employees who did not receive a flu shot.

  2. Demographic characteristics on flu shot participation [ Time Frame: Up to 3 years ]
    The investigators will explore how demographic characteristics correlate to employees receiving an influenza vaccination.



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.


Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population

Employees at the headquarters of a health benefits administrator in the US. These employees are generally not health care personnel. All of them have health insurance.

Of HQ employees, 520 are housed in Building 1 (the site of the vaccination clinic) and 1,281 are housed in Building 2. The two buildings are 131 meters apart and connected by an enclosed passageway. The clinic was located near the cafeteria in Building 1 and adjacent to the passageway connecting the two buildings.

Criteria

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

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 ClinicalTrials.gov identifier (NCT number): NCT01455753


Locations
United States, Missouri
Express Scripts
Saint Louis, Missouri, United States, 63121
Sponsors and Collaborators
National Bureau of Economic Research, Inc.
National Institute on Aging (NIA)
Investigators
Principal Investigator: David I Laibson, Ph.D. National Bureau of Economic Research, Harvard University

Publications of Results:
Responsible Party: National Bureau of Economic Research, Inc.
ClinicalTrials.gov Identifier: NCT01455753     History of Changes
Other Study ID Numbers: 0006
P30AG034532 ( U.S. NIH Grant/Contract )
P01AG005842 ( U.S. NIH Grant/Contract )
First Posted: October 20, 2011    Key Record Dates
Last Update Posted: December 18, 2017
Last Verified: December 2017

Keywords provided by National Bureau of Economic Research, Inc.:
Influenza
Proximity