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Associations between two job stress models and measures of salivary cortisol

  • Giovanni MainaEmail author
  • Massimo Bovenzi
  • Antonio Palmas
  • Francesca Larese Filon
Original Article

Abstract

Purpose

To investigate the association between two job stress models—the job demand-control model and the effort-reward imbalance model—and repeated measures of salivary cortisol among male and female call-centre operators.

Methods

Daily cortisol profiles consisting of seven time points were measured across two workdays and one leisure day to determine the cortisol awakening response and the cortisol output in the day in 104 volunteers. The employees completed two self-administered questionnaire—the Karasek’s demand-control questionnaire and the Siegrist’s effort-reward imbalance questionnaire—to assess psychosocial hazards at work. The relations between the perceived workload measures and salivary cortisol levels were analyzed by means of generalized estimating equations method after adjusting for potential confounders (gender, age, educational level, marital status, morning awakening time, sleep duration and quality, weekdays, work schedule, adherence to sampling procedure).

Results

The total cortisol amount excreted in the awakening period was positively associated with the job strain measures (high strain vs. low strain: 1.4 (2.4–0.3) nmol/l). In contrast, individuals scoring higher in effort-reward imbalance at work had both lower cortisol awakening response (high imbalance vs. low imbalance: −0.7 (−1.3 to −0.2) nmol/l) and lower diurnal secretory activity (−9.2 (−17.7 to −0.7) nmol/l). Gender, weekday and adherence to sampling schedule significantly influenced the cortisol excretion in the morning period.

Conclusions

Our results indicate that the two work stress models differentially affect salivary cortisol output. This finding suggests that combining the information from two complementary job stress models results in improved knowledge on the psychobiological correlates of the psychosocial work environment.

Keywords

Job demand-control model Effort-reward imbalance model Salivary cortisol Psychosocial hazards 

Notes

Acknowledgments

This study was supported by Telecom Italia Group. All of the authors exclude any competing interest.

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Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • Giovanni Maina
    • 1
    Email author
  • Massimo Bovenzi
    • 2
  • Antonio Palmas
    • 1
  • Francesca Larese Filon
    • 2
  1. 1.Università di TorinoTorinoItaly
  2. 2.Università di TriesteTriesteItaly

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