Having More Healthy Practice was Associated with Low White Blood Cell Counts in Middle-aged Japanese Male and Female Workers

  • OTSUKA Rei
    Department of Public Health/ Health Information Dynamics, Field of Social Life Science, Nagoya University Graduate School of Medicine Department of Epidemiology, National Institute for Longevity Sciences, National Center for Geriatrics and Gerontology
  • TAMAKOSHI Koji
    Department of Public Health/ Health Information Dynamics, Field of Social Life Science, Nagoya University Graduate School of Medicine
  • WADA Keiko
    Department of Public Health/ Health Information Dynamics, Field of Social Life Science, Nagoya University Graduate School of Medicine
  • MATSUSHITA Kunihiro
    Department of Public Health/ Health Information Dynamics, Field of Social Life Science, Nagoya University Graduate School of Medicine Department of Cardiology, Nagoya University Graduate School of Medicine
  • OUYANG Pei
    Department of Public Health/ Health Information Dynamics, Field of Social Life Science, Nagoya University Graduate School of Medicine
  • HOTTA Yo
    Department of Public Health/ Health Information Dynamics, Field of Social Life Science, Nagoya University Graduate School of Medicine Department of Metabolic Diseases, Nagoya University Graduate School of Medicine
  • TAKEFUJI Seiko
    Department of Public Health/ Health Information Dynamics, Field of Social Life Science, Nagoya University Graduate School of Medicine Department of Metabolic Diseases, Nagoya University Graduate School of Medicine
  • MITSUHASHI Hirotsugu
    Department of Public Health/ Health Information Dynamics, Field of Social Life Science, Nagoya University Graduate School of Medicine Department of Cardiology, Nagoya University Graduate School of Medicine
  • TOYOSHIMA Hideaki
    Department of Public Health/ Health Information Dynamics, Field of Social Life Science, Nagoya University Graduate School of Medicine Health Care Center of Anjo Kosei Hospital
  • SHIMOKATA Hiroshi
    Department of Epidemiology, National Institute for Longevity Sciences, National Center for Geriatrics and Gerontology
  • YATSUYA Hiroshi
    Department of Public Health/ Health Information Dynamics, Field of Social Life Science, Nagoya University Graduate School of Medicine

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White blood cell (WBC) count is well known to be an independent risk marker for cardiovascular disease. The aim of this study is to examine the relationships of WBC counts to seven health practices including obesity, eating habits, smoking, alcohol intake, sleeping, physical activity, and perceived mental stress, and then clustering the relevant healthy practices. The subjects were 1,492 male and 316 female Japanese workers aged 40 yr and over in 2002. Each of seven health practices from a self-administered questionnaire was categorized as a ‘healthy’ or ‘unhealthy’ practice, and WBC counts from fasting blood samples were determined by automated particle counters. The means of age and WBC counts were 49.5 yr and 5,375 cells/μl in men, and 48.6 yr and 4,890 cells/μl in women, respectively. After multivariate adjustments for all health practices and age, the estimated WBC counts were significantly lower in normal weight subjects and never or former smokers (p<0.01). Age-adjusted WBC counts decreased significantly by 204.9±23.7 cells/μl (means±SE) and 117.6±53.2 cells/μl for each increase in one healthy practice (p<0.05), respectively, suggesting that cultivating healthier practices would lead to lower WBC counts. This study recommends modifying unhealthy practice one by one and maintaining healthy practices as an effective strategy for the prevention of atherosclerotic diseases, in addition, to quit smoking or abstain from heavy smoking especially in men is important to prevent the low-grade inflammation. <br>

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