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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT01455753
Other study ID # 0006
Secondary ID P30AG034532P01AG
Status Completed
Phase N/A
First received October 12, 2011
Last updated December 14, 2017
Start date October 2011
Est. completion date May 2012

Study information

Verified date December 2017
Source National Bureau of Economic Research, Inc.
Contact n/a
Is FDA regulated No
Health authority
Study type Observational

Clinical Trial 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).


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.


Recruitment information / eligibility

Status Completed
Enrollment 1801
Est. completion date May 2012
Est. primary completion date May 2012
Accepts healthy volunteers Accepts Healthy Volunteers
Gender All
Age group 18 Years and older
Eligibility 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

Study Design


Related Conditions & MeSH terms


Intervention

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

Locations

Country Name City State
United States Express Scripts Saint Louis Missouri

Sponsors (2)

Lead Sponsor Collaborator
National Bureau of Economic Research, Inc. National Institute on Aging (NIA)

Country where clinical trial is conducted

United States, 

References & Publications (1)

Beshears J, Choi JJ, Laibson DI, Madrian BC, Reynolds GI. Vaccination Rates are Associated With Functional Proximity But Not Base Proximity of Vaccination Clinics. Med Care. 2016 Jun;54(6):578-83. doi: 10.1097/MLR.0000000000000523. — View Citation

Outcome

Type Measure Description Time frame Safety issue
Primary Receipt of influenza vaccine The investigators will measure whether proximity to a flu shot clinic effected whether an employee received an influenza vaccine. One week
Secondary Absenteeism The investigators will measure absenteeism in employees who received a flu shot versus employees who did not receive a flu shot. The investigators will follow employees' absenteeism for five to six months
Secondary Demographic characteristics on flu shot participation The investigators will explore how demographic characteristics correlate to employees receiving an influenza vaccination. Up to 3 years
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