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Heart rate variability assessment in Japanese workers recovered from depressive disorders resulting from job stress: measurements in the workplace

  • Mikio Takada
  • Takeshi Ebara
  • Michihiro Kamijima
Original Article

Abstract

Purpose

The purpose of this study is to clarify workers’ autonomic nerve balance after long-term sick leave due to depressive disorders resulting from job stress compared with healthy workers.

Methods

The participants were 28 Japanese male workers recovered from depressive disorders and 75 healthy male workers. For each participant, the lifestyle and the fatigue within 1 month were assessed by a checklist. Heart rate variability (HRV) was measured at the workplace by acceleration plethysmography (APG). HRV was assessed by the coefficient of variation of rate intervals (CV), the spectral components in the high- and low-frequency areas represented by the normalized HF and LF (nHF and nLF), and the ratio of LF to HF components (LF/HF).

Results

There was no significant difference in individual lifestyle and fatigue symptoms between the recovered and the healthy workers. The former workers showed significantly lower CV, higher nLF and log10LF/HF, and lower nHF that represent the predominance of sympathetic activity in comparison with the healthy workers. Moreover, the recovered workers who discontinued medications indicated significantly higher nLF and log10LF/HF, and lower nHF compared to the recovered workers who continued their medications.

Conclusions

Recovered workers in the workplace tended to show the depressive HRV feature that is the dominant sympathetic activity compared with the healthy workers. They might still be showing job stress that was not detected by the checklist. HRV analyses by APG in addition to questionnaire has the potential to become an effective approach for assessing workers’ job stress to prevent repeated absences.

Keywords

Acceleration plethysmography Heart rate variability Depressive disorders Job stress 

Notes

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • Mikio Takada
    • 1
  • Takeshi Ebara
    • 1
  • Michihiro Kamijima
    • 1
  1. 1.Department of Occupational and Environmental HealthNagoya City University Graduate School of Medical SciencesNagoyaJapan

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