Human Ecological Study on Health Condition of City-Dwellers-Effects /f Densely Inhabitant on Health-

为了评估城市化对健康的影响，对长崎市人口、环境和健康状况的内部结构进行了调查。1.1980年人口普查中的44个变量的因子分析表明，长崎市259个居民区的人口分布首先表现为与就业状况有关的变量，如个体户和家庭工作者的比率(因素1)。变量与工作类型(蓝/白)和教育载体有关，与家庭状况有关的变量分别被归类为因素2和因素3。2.关于精神疾病的流行病学研究表明，每个地区的社会经济状况可能影响精神障碍的发生率：男性精神分裂症的发病率较高的是商业区，那里的居民大多是久坐不动的人。在人口社会流动性较高的居民区，女性的比例较高。从1985年人口普查50个卫生行政区域的人口密度与其他人口学特征的关系来看，人口密度高的地区的居民大多从事第三产业，居住在小户型，如核心家庭或独户家庭。这些地区的社会流动性也很高，主要是向外移徙。人口密度与死胎、低体重儿出生率等可能与生殖有关的健康指标之间存在显著的相关性，两者均随人口密度的增加而升高。

For evaluating the impact of urbanizatoon on health, internal structures of population, environment and health comdition in Nagasaki city were examined. 1. Factor analysis for 44 variables in 1980 population census revealed that distribution of population among 259 dinsly inhabitant districts (DID) in Nagasaki city was firstly characterized by variables related to employment status, such as rates of self-employed and family workers(Factor 1).The variables realted to kind of jobs(blue colour/white colour) and educational carrier, and those for household condition were categorized as Factor 2 and 3, respectively.2.Epidemiological studies on mental illness indicated that socioeconomic condition in each district might affect the incidence of mental disorders: higher incidence of shizophrenia in male was found in commercial districts wher most of dwellers were sedantive, that in female was higher in residence districts where social mobilities of population had been high.3. Judging from relationships between population density and other demographic chacteristics among 50 Health administration districts using 1985 census, dwellers in high densely districts mostly engaged in tertiary industry and lived in small size of households,such as nuclear or single family. Social mobility, mainly in out-migration was also high in those districts. Significant correlations were found between population density and health indicators, presumably related to reproduction, such as still birth and low weight infant birth rates:both of them became to be higher with increase of population density.