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A study on the relationship between job stress and hormone levels in fingernails of workers

Association of Effort-Reward Imbalance with Fingernail Cortisol Levels in Apparel Manufacturing Workers - ERI-Nail Study

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
JPRN
Registry ID
JPRN-UMIN000058838
Enrollment
80
Registered
2025-08-31
Start date
2018-06-21
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Occupational stress

Interventions

None listed

Sponsors

International University of Health and Welfare
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: Workers engaged in apparel manufacturing (including full-time, contract, part-time, and temporary employees) Aged 20 years or older Able to read and write in Japanese, and consented to participate in the questionnaire survey and provide fingernail samples Provided written informed consent after receiving an explanation of the study purpose and procedures

Exclusion criteria

Exclusion criteria: Individuals with nail disorders or abnormalities e.g., participants with conditions such as onychomycosis or other nail abnormalities that may affect cortisol measurement. Individuals with artificially altered nails Participants who had artificial nail treatments such as nail art, gel nails, or sculptured nails. Individuals who had recently clipped their nails (within the past month) and were unable to provide a sufficient nail sample Participants whose nail length was insufficient for hormone analysis. Individuals with incomplete responses to the questionnaire Participants with missing data that would hinder the analysis of the ERI scale or background variables.

Design outcomes

Primary

MeasureTime frame
Fingernail cortisol concentration (measured at Time1 concurrently with the questionnaire survey and at Time2 approximately 3-4 months after the survey)

Secondary

MeasureTime frame
Effort score (measured using the ERI questionnaire at Time1) Reward score (measured using the ERI questionnaire at Time1) Effort-Reward ratio (calculated from the ERI questionnaire at Time1) Association with background factors such as gender, age, job type, and working hours

Countries

Japan

Contacts

Public ContactMikiko Kawasaki

Japanese Red Cross Kyushu International College of Nursing, Fukuoka, Japan Department of Nursing, School of Nursing

m-kawasaki@jrckicn.ac.jp0940-35-7001

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026