Household Income and Mortality Risk Related to Different Sociodemographic Characteristics of Japanese Men from a Cohort Study

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  • LI Yingzi
    NPO International Eco-Health Research Group
  • SUZUKI Shosuke
    NPO International Eco-Health Research Group
  • WAKIMOTO Yuji
    NPO International Eco-Health Research Group
  • HAYASHI Kunihiko
    Unit of Community Health Sciences, Gunma University Graduate School of Health Sciences
  • KOYAMA Hiroshi
    NPO International Eco-Health Research Group Department of Public Health, Gunma University Graduate School of Medicine

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<p>Health is clearly influenced by socioeconomic status. However, few studies examine the relationship between socioeconomic and sociodemographic factors, mortality risk, and household income in Japanese working-age and retirement-age men. The purpose of this study is to clarify the associations between mortality risk and socioeconomic status in Japanese middle-aged men.</p><p>The subjects, 3,751 men aged 47-77 years, were separated into working-age and retirement-age groups. They were administered a questionnaire assessing age, annual household income, occupation, education level, marital status, household size, physical exercise, medical examination, BMI, dietary habits, chronic diseases, smoking habit and alcohol consumption. Household income was classified into five quintile groups. The numbers of deaths were counted in the period from 2000 to 2011. Logistic regression and Cox hazard models were used to test for statistical significance.</p><p>Men in the lower household income group showed significantly increased mortality risk which were related to unemployment rate, dissatisfaction with work, rates of living alone and of unmarried status, and significantly lower education levels in both age groups. In the working-age group, lower household income men had a significantly higher current smoking rate and a lower physical examination rate.</p><p>This study provides evidence that household income is an important contributor to mortality risk and social inequalities, and the income has a stronger effect on working-age men than on retirement-age men.</p>

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