Journal of epidemiology
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Journal of epidemiology · Jan 2011
An association between long-term exposure to ambient air pollution and mortality from lung cancer and respiratory diseases in Japan.
Evidence for a link between long-term exposure to air pollution and lung cancer is limited to Western populations. In this prospective cohort study, we examined this association in a Japanese population. ⋯ Long-term exposure to air pollution is associated with lung cancer and respiratory diseases in Japan.
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Journal of epidemiology · Jan 2011
Effect of maternal age and fertility treatment on the increase in multiple births in Japan: vital statistics, 1974-2009.
The present study used vital-statistics data to estimate the effect of maternal age and fertility treatment on the number and rate of multiple live births in Japan from 1974 through 2009. ⋯ The rapid increases in Japan in the number and rate of multiples born to women older than 30 years are likely due to iatrogenic rather than spontaneous multiple births.