Category: Airways Diseases

No correlation between prevalence of symptoms aiid air pollution Was observed among children who had no allergic disposition (Thble 5). Allergic disposition is defined here as children who have the anamnesis of allergic disease (nettle rash, allergic coryza, or eczema) or family history of allergic disease (asthma or allergic coryza). On the Other hand, it was shown that children who have allergic disposition were profoundly influenced by air pollution. Slight effects of passive smoking were observed ohly in the prevalence of wheezing but not in persistent cough, phlegm, or asthma-like symptoms. No clear correlation was observed in this survey between the prevalence of respiratory symptoms among the children and nutrition, dwelling conditions, or heating apparatus. …Read the rest of this article

Epidemiology of Chronic Airways Diseases in Japan: Prevalence of Respiratory SymptomsSince the 1960s, when air pollution became one of the most serious health problems in Japan, numerous surveys using the British MRC questionnaire on respiratory symptoms have been taken throughout the country to discover the direct health hazard of high concentrations of SO,. Fortunately, air pollution by SO, was lowered rapidly by technical improvement; however, cigarette smoking, air pollution by N02, NO,, etc, and indoor pollution are still important health hazards even now More detailed surveys on Respiratory symptoms using ATS-DLD questionnaires are necessary and should be carried out repeatedly to make clear the long-term effects of these factors. …Read the rest of this article

Changes in Mortality From Lung Diseases
Based on official statistics on causes of death, the number of deaths caused by various respiratory diseases within the past 35 years was analyzed. The number of deaths from each disease was expressed as the mean over 5 years. Table 1 shows the death rate from all respiratory diseases per 100,000, and the fraction of all deaths that is attributable to respiratory diseases, expressed in 5-year increments for the years 1951-85. Mortality due to tuberculosis decreased markedly and continually during these 35 years (Fig 2), from a high of 43.5% of all respiratory diseases deaths in 1951-55, to only 5.8% in the past 5 years. Mortality from pneumonia, influenza, or acute respiratory diseases decreased over the first 10-15 years of observation (Fig 3) but has been about 40% (36.3-42.9%) of all respiratory deaths over the 35 years. …Read the rest of this article

Epidemiology of Chronic Airways Diseases in JapanAfter World War II, Japan started reconstruction from a μL very poor socioeconomic condition. In those days, many people were suffering from malnutrition, unemployment, and poor living conditions, so factories had to be started without considering air pollution. As industry grew rapidly, environmental pollution such as air and water pollution spread widely throughout the country. The first health hazard by air pollution after World War II was the so-called Tokyo-Yokohama Asthma episode in the latter half of 1950s. Huber et al reported that some of the US soldiers who came to Japan often complained of unusual asthmatic attacks because of the polluted air in the Tokyo-Yokohama area at that time. …Read the rest of this article