Effort-reward imbalance and physical health among Japanese workers in a recently downsized corporation.
OBJECTIVE
The present study investigated the effort-reward imbalance (ERI) model-related biological markers of disease risks in Japanese workers of a recently downsized manufacturing corporation.


METHODS
A total of 441 workers was examined to find whether situational effort-reward imbalance or personal overcommitment was associated with hematological and biochemical measurements, serum cortisol, and urine biopyrrins as oxidative metabolites of antioxidant bilirubin.


RESULTS
The effort-reward imbalance was positively associated with the values of red blood cells, hemoglobin, hematocrit, triglycerides and glutamic pyruvic transaminase (GPT), and negatively correlated with the high-density lipoprotein cholesterol level. Overcommitment was positively related to the values of hematocrit and glucose levels, but negatively associated with the total protein level. The relationships between effort-reward imbalance and GPT level, and that between overcommitment and glucose level, persisted when potential confounders were adjusted for. The ERI model was not significantly related to either cortisol or biopyrrins levels.


CONCLUSIONS
The ERI model seems to have an impact on the physical health of the downsized Japanese workers, although the results are mixed and are different from those in workers of Western countries.
Institute of Health Science, Kyushu University, 6-1 Kasuga Park, Kasuga, Fukuoka, 816-8580, Japan. irie@ihs.kyushu-u.ac.jp
Masahiro
M
Irie
Akizumi
A
Tsutsumi
Izuru
I
Shioji
Fumio
F
Kobayashi
D000328:Adult; D000368:Aged; D015415:Biomarkers / Q000097:blood / Q000652:urine; D001794:Blood Pressure / Q000502:physiology; D003430:Cross-Sectional Studies; D004177:Dipyrone / Q000652:urine; D005260:Female; D006801:Humans; D006854:Hydrocortisone / Q000097:blood; D007564:Japan; D008297:Male; D008875:Middle Aged; D016273:Occupational Exposure / Q000009:adverse effects*; D018384:Oxidative Stress / Q000502:physiology; D020415:Personnel Downsizing / Q000523:psychology*; D010559:Personnel Management; D012056:Reinforcement, Social; D012201:Reward; D012307:Risk Factors; D013315:Stress, Psychological / Q000097:blood*; D016526:Workload
D015415:Biomarkers; D004177:Dipyrone; D006854:Hydrocortisone