BPA Monitoring Study in Cashiers | National Institute of Environmental Health Sciences
Source: https://www.niehs.nih.gov/research/atniehs/labs/crb/studies/closed-studies/bpa
Archived: 2026-04-23 17:31
BPA Monitoring Study in Cashiers | National Institute of Environmental Health Sciences
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Study / Trial Background
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We intend to conduct a pilot study designed to measure BPA levels before and after occupational exposure to thermal paper used in cash registers. We will recruit cashiers from a local commercial store that is currently still using BPA-laden thermal paper and plans to switch to BPA-free paper in the near future. The study uses a within-subject comparison design, using serum and urine samples to determine whether BPA is detectable in the study population at sufficient levels to measure differences in paired samples. Two phases of sample collection are proposed: Phase I - collecting paired samples on two separate occasions before the implementation of BPA-free thermal paper use in cash registers; and Phase II - collecting paired samples on two separate occasions after the implementation of this change in thermal paper.
Eligibility Criteria
Ages Eligible for Study: 18–100 years
Sexes Eligible for Study: All
Employed as a cashier at the site location
Anticipate continued employment at this business for the duration of both phases of the study
Able to understand and provide written informed consent to participate in the study
Have a minimum of 24 hours off from work before providing pre-shift samples
Participants may be healthy or have preexisting conditions
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Last Reviewed: February 23, 2026
Skip Navigation
BPA Monitoring Study in Cashiers
Close the left navigation
Add
Study / Trial Background
This study is no longer accepting participants.
To find studies that are currently recruiting, please visit the
Join an
NIEHS Study
website
For More Information
ClinicalTrials.gov
We intend to conduct a pilot study designed to measure BPA levels before and after occupational exposure to thermal paper used in cash registers. We will recruit cashiers from a local commercial store that is currently still using BPA-laden thermal paper and plans to switch to BPA-free paper in the near future. The study uses a within-subject comparison design, using serum and urine samples to determine whether BPA is detectable in the study population at sufficient levels to measure differences in paired samples. Two phases of sample collection are proposed: Phase I - collecting paired samples on two separate occasions before the implementation of BPA-free thermal paper use in cash registers; and Phase II - collecting paired samples on two separate occasions after the implementation of this change in thermal paper.
Eligibility Criteria
Ages Eligible for Study: 18–100 years
Sexes Eligible for Study: All
Employed as a cashier at the site location
Anticipate continued employment at this business for the duration of both phases of the study
Able to understand and provide written informed consent to participate in the study
Have a minimum of 24 hours off from work before providing pre-shift samples
Participants may be healthy or have preexisting conditions
Back
to Top
Last Reviewed: February 23, 2026