Job strain, worksite support, and nutrient intake among employed Japanese men and women.
BACKGROUND
The association of job strain (as defined by the job demands/control model) and worksite support with nutrient intake is not clear.


METHODS
A questionnaire survey was conducted of 25,104 workers employed in nine companies in Japan. Job strain and worksite support were assessed using the Job Content Questionnaire. Daily intake of 17 nutrients was measured using a dietary history questionnaire. Data from 15,295 men and 2,853 women were analyzed, controlling for age, education, marital status, occupation, and study site.


RESULTS
Among men, job strain was positively associated with average daily intakes of fat, vitamin E, cholesterol, poly- and mono-unsaturated fatty acids (p for trend<0.05), and worksite support was positively associated with average daily intakes of total energy, crude fiber, retinol, carotene, vitamins A, C, and E, cholesterol, and saturated fatty acid (p for trend<0.05). Among women, worksite support was positively associated with average daily intakes of total energy, protein, vitamin E, and polyunsaturated fatty acid (p for trend<0.05). However these differences were generally small.


CONCLUSIONS
The present study showed that job strain and worksite support were only weakly and inconsistently associated with nutritional intakes. It does not seem that changes in nutritional intakes explain the association between job strain or worksite support and coronary heart disease.
Hygiene and Preventive Medicine, Okayama University Graduate School of Medicine, Dentistry & Pharmaceutical Sciences, Okayama, Japan. norito@md.okayama-u.ac.jp
Norito
N
Kawakami
Akizumi
A
Tsutsumi
Takashi
T
Haratani
Fumio
F
Kobayashi
Masao
M
Ishizaki
Takeshi
T
Hayashi
Osamu
O
Fujita
Yoshiharu
Y
Aizawa
Shogo
S
Miyazaki
Hisanori
H
Hiro
Takeshi
T
Masumoto
Shuji
S
Hashimoto
Shunichi
S
Araki
D000293:Adolescent; D000328:Adult; D003327:Coronary Disease / Q000453:epidemiology / Q000209:etiology*; D004032:Diet; D004034:Diet Surveys; D005260:Female; D006801:Humans; D007564:Japan / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D009786:Occupational Health Services; D012959:Socioeconomic Factors; D013315:Stress, Psychological / Q000150:complications*; D017132:Workplace