Association of employment and company size with lung cancer screening participation among Japanese based on the socioeconomic conditions using the Comprehensive Survey of Living Conditions.

BACKGROUND: The proportion of non-regularly employed persons has increased in Japan, but few studies have examined the relationship between employment status and lung cancer screening (LCS) participation. METHODS: Authors analyzed data from the 2010 Comprehensive Survey of Living Conditions in Japan. The anonymous responses of 28,951 people aged 40-69 years old were analyzed. Authors defined nine employment status categories: unemployed, regularly employed in a large-, middle-, and small-scale company, non-regularly employed in a large-, middle-, and small-scale company, self-employed, and other. LCS participation in the past year was surveyed through a self-reported questionnaire. Sex-specific prevalence ratios (PRs) and 95% confidence intervals (CIs) for LCS participation for all employment status categories, using the regularly employed in a middle-scale company category as the reference, were calculated using multivariable Poisson regression analysis, after adjusting for potentially confounding factors. RESULTS: Multivariable-adjusted PRs (95% CI) for LCS participation for the regularly employed in a large-scale company were 1.33 (1.25-1.41) in men and 1.53 (1.38-1.71) in women. Multivariable-adjusted PRs (95% CI) for LCS participation for the non-regularly employed in a middle- and small-scale company compared with the regularly employed in a middle-scale company were 0.81 (0.72-0.92) and 0.62 (0.50-0.76) in men, and 0.89 (0.80-0.99) and 0.80 (0.71-0.91) in women, respectively. CONCLUSION: Regularly employed in a large-scale company had significantly higher LCS participation, and non-regularly employed in a middle- or small-scale company showed significantly lower LCS participation than those who were regularly employed in a middle-scale company.

Association between unemployment and insomnia-related symptoms based on the Comprehensive Survey of Living Conditions: a large cross-sectional Japanese population survey.

This study examined whether employment category was associated with insomnia-related symptoms (IRS). We analyzed the 2010 Comprehensive Survey of Living Conditions in Japan. The anonymous data of 43,865 people ranging from 20-59 yr of age were analyzed. We defined six employment categories: regularly employed, non-regularly employed, self-employed, others, unemployed and not in the labor force. Sex-specific odds ratios (ORs) and 95% confidence intervals (CIs) of IRS were calculated using multivariable logistic regression analysis, adjusted for confounding factors. We further conducted stratified analyses by mental illness, smoking status, and age. For men, the multivariable ORs (95% CI) of IRS for the unemployed and those who were not in the labor force were 2.5 (1.8-3.4) and 2.1 (1.2-3.7). For women, the multivariable ORs (95% CI) for the unemployed was 1.9 (1.5-2.5). After being stratified by mental illness, we found that the associations were not significant in persons with mental illness, and were more evident in persons without mental illness. Smoking and age did not modify the associations. In conclusion, we found a significantly higher OR of IRS for the unemployed, and men who were not in the labor force. These associations were particularly more evident for individuals without mental illness.