Demographic Studies of Employees in the Tokyo Railway Bureau

Abstract

A demographic survey was carried out by questionaire for all employees and their families (192, 499 persons in total) in Tokyo as of 195, On the basis of the data of population and deaths thus collected, abridged life tables were constructed for the whole population surveyed and two subgroups of them according to their residence, urban or rural.
As indices of health for all ages and age groups the following figures derived from the life tables may be given:
The e₀, (63.0 years) for males and that (67.9 years) for females, are superior to those for all Japanese and other populations in some occupations. This superiority of the average length of life is due to low mortalities in all age groups except for old people above 55 years.
The e₀ for the employees and their families living in urban districts is slightly longer than that for those living in rural districts, due mainly to lower mortality of small children.
Applying the life tables thus obtained, population dynamics were studied, the summarized results being as follows:
The average length of labor years from the age at employment to that of retirement (55 years) is as follows:
As cause of deaths the first wg, s senility, intracranial vascular lesions, neoplasmas, tuberculosis being in the rank order.
Due to tuberculosis the average length of life at birth was reduced by 1.19 years for both sexes.