The Effect of Proximity on Flu-Shot Participation



Status:Completed
Conditions:Influenza
Therapuetic Areas:Immunology / Infectious Diseases
Healthy:No
Age Range:18 - Any
Updated:12/20/2017
Start Date:October 2011
End Date:May 2012

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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).

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.

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
We found this trial at
1
site
1 Express Way
Saint Louis, Missouri 63121
398
mi
from 43215
Saint Louis, MO
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