Affiliations: Department of Hygiene and Public Health, Nippon Medical School, Tokyo, Japan
Note: [] Corresponding author: Tomoyuki Kawada, Department of Hygiene and
Public Health, Nippon Medical School, 1-1-5 Sendagi, Bukyo-Ku, Tokyo 113-8602,
Japan. Tel.: +81 3 3822 2131; Fax: +81 3 5685 3065; E-mail: [email protected]
Abstract: BACKGROUND: The relationship between job stress and job
satisfaction by the follow-up study should be more evaluated for workers'
health support. OBJECTIVE: Job stress is strongly affected by the content
of the job and the personality of a worker. This study was focused on
determining the changes of the job stress and job satisfaction levels over a
two-year interval, using the Brief Job Stress Questionnaire (BJSQ). METHODS: This self-administered questionnaire was distributed to the same 310
employees of a Japanese industrial company in 2009 and 2011. Sixty-one
employees were lost from 371 responders in 2009. Data of 16 items from 57 items
graded on a four-point Likert-type scale to measure the job stressors,
psycho-physical complaints and support for workers, job overload (six items),
job control (three items), support (six items) and job satisfaction score (one
item) were selected for the analysis. RESULTS: The age-adjusted partial
correlation coefficients for job overload, job control and support were 0.684
(p< 0.001), 0.474 (p< 0.001) and 0.612 (p< 0.001), respectively.
The concordance correlation coefficient (and 95% confidence interval
indicated within parentheses) for job overload, job control and support were
0.681 (0.616–0.736), 0.473 (0.382–0.555), and 0.623 (0.549–0.687),
respectively. There were no significant differences in the mean score for job
overload, job control or support, although significant decline in the job
satisfaction level was apparent at the end of the two-year period (p<
0.05). There was also a significant decline in the job satisfaction in 2009 and
in 2011 for subjects with keeping low job strain. CONCLUSIONS: No significant changes in the scores on the three elements of job stress were
observed over the two-year study period, and the job satisfaction level
deteriorated significantly during this period. There was a decline in the job
satisfaction in the two-year period, although subjects did not suffer from job
stress at the same period.
Keywords: Occupational survey, demand-control-support model, questionnaire, agreement, follow-up study
