The relationship between employment grade and plasma fibrinogen level among Japanese male employees. YKKJ Research Group.


Plasma fibrinogen is an important risk factor for cardiovascular disease, and is associated with socioeconomic status in Europe and the United States. We evaluated whether the relationship between socioeconomic status and plasma fibrinogen level exists in Japanese male employees, and whether this relationship is independent of other correlates of plasma fibrinogen. This cross-sectional study was conducted on full-time male employees aged 20-58 in a metal-products factory between April 1996 and March 1997. Altogether 4375 employees (92.9%) participated. Low employment grade and low educational background were associated with increased age-adjusted plasma fibrinogen level. Adjusting for body mass index, waist to hip ratio, height, smoking habit, alcohol consumption, physical activity at leisure and systolic blood pressure did not attenuate these associations much. Adjusting for white blood cell count and hemoglobin Alc reduced the associations of both employment grade and educational background with plasma fibrinogen level, nevertheless these relationships remained significant.


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