The purpose of this study is a re-evaluation of population dynamics, especially of marriage, divorce, and stillbirth by legitimacy, in Japan before the World War II. Formerly we reported results of similar analysis for the period between 1872 and 1898 and for the period 1899 and 1919. In this study, we have investigated the successive period from 1920 to 1940. Marriage rates over this period were estimated to be around 60 to 80 per 1, 000 unmarried women over age 15 and showed a decrease until the mid-1930's . Divorce rates were estimated to be around three to five per 1, 000 married women and showed a clear decrease since 1920. Illegitimate birth rates also showed a clear decrease from 27 to eight per 1, 000 unmarried women over age 15 in the study period. Ratios of illegitimate births to all births also showed a clear decrease. It was considered that these trends of marriage, divorce and birth by legitimacy were affected by the new appeared custom of registration of marriage which was the retardation of registration of marriage until the first baby was born. Illegitimate stillbirth rates were much higher than those of the legitimate in the study period. Illegitimate stillbirth rates showed a decline until 1927 and then turned to a increase. Legitimate stillbirth rates showed a decline in all study period but annual rates of decreasing were going to smaller since 1928. It was suspected that these trends of stillbirth were made by the phenomenon that some deaths of infant were registered as stillbirth.
The purpose of the present study was to clarify the multi-dimensional spatial structures of health conditions based on subjective and objective evaluations. In particular, "poor health" which is the transitional stage from positive health to disease was diagnosed by a doctor in terms of medical checks in health examinations. With this design, two types of self-rating questionnaires, consisting of 47 items related to the contents regarding physical and mental conditions based on subjective symptoms by self-estimation and 9 items related to consciousness and behavior for health, as well as measurements, such as physical fitness tests, and medical checks were administered to 608 middle-aged subjects. Then factor analysis was applied to the available data, and five factors were extracted. These factors could be regarded as structured scales on multi-dimensional figures. Next, principal components analyses were applied to the items that showed high factor loading. With this analysis, first principal components were extracted and interpreted as synthetic traits. Then, Hayashi's quantification method type III was applied to these traits in order to identify their locations on the multi-dimensional figure. As a result of this analysis, three phases representing subjectivity, objectivity, and consciousness, were extracted on two-dimensional space. By the combinations of these phases, it was possible to evaluate the health condition from a multi-dimensional structural viewpoint. Next, Hayashi's quantification method type II were applied to the medical check items and principal components scores, respectively. The former was applied in order to confirm the predictive value of discriminating "poor health", while the latter was applied in order to calculate the index number for the degree "poor health". In the end, the linear function was computed from the latter analysis. It was suggested that this function was available as a index for distinguishing between "poor health" and good health.
The present study aims at establishing methods of health administration of people with mental retardation in the institution . The causes and death of people with mental retardation (number examined: 968 persons) over a long period of time were epidemio logically surveyed, focussing on its time trend . And the following results became clear. In profound and severe mental retardation, the prenatal causes were more frequently identified the perinatal and postnatal causes (p<0.001), and the proportion of the prenatal causes was constant, contrasting to the reduction of that of the postnatal ones. Consequently, the difference has become larger recently . On the other hand, people with mental retardation has become aged as a whole. Epilepcy was the most common complication attached to mental retardation . The subjects whose causes were originated in the prenatal period have high prevalence of heart defects, hepatitis and obesity. The death rates of people with mental retardation were higher than those of nonmental retardation in all age class . The causes of death have changed from infectious diseases to chronic diseases . The acquired heart defects were recently the most responsible to death among the complications such as epilepcy, hypertention and hepatitis.
The objective of this study is to know how hypertensive people perceive their health condition and what kinds of subjective symptoms they complain of, based on a comparative study with normotensives. The Todai Health Index (THI) questionnarie was applied to 1, 569 residents in a rural area in city M. Ninety hypertensives which were consisted of 38 males and 52 females were sampled from the subjects. As a matched group, 90 normotensives were sampled from the same population matched with age and sex. The average age of hypertensive males was 56.8 and that of the females was 59.9 years old. Male hypertensives did not complain of their subjective symptoms more than the matched normotensives, and the lifestyle of the former group was more regular than those of the latter. On the other hand, female hypertensives complained more than the matched normotensives. They were likely to have hot flashes, feel their head "heavy" or "dull", fese slightly faint, and be bothered by bleeding gums.