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前言厚生省所规定的难病是指原因不明,没有确切治疗方法,多有慢性经过,且有遗留后遗症之虞的疾病。从根本上说,正确掌握这些疾病的生物学及社会问题的大小及其对策的紧急程度是重要的,这也属于流行病学的范畴。流行病学就是要明确各种疾病的频数和分布情况,并通过全面分析其特点,研究疾病的频数和分布规律。从而弄清与发病有关的主要流行病学因素,据此才能采取有效的预防财策。频数和分布是以特定时间和空间内一定人群中的患者数来表示的。通过对性别、年龄等人群的各种特点进行分析,从多方面明确该病的流行病学情况。
Preface The Ministry of Health and Welfare stipulated that the disease is unknown, there is no specific treatment, there are more chronic, and the risk of residual sequelae. Fundamentally speaking, it is important that the correct understanding of the biological and social problems of these diseases and the urgency of their response are within the epidemiological category. Epidemiology is to clear the frequency and distribution of various diseases, and through a comprehensive analysis of its characteristics, study the frequency and distribution of disease. In order to clarify the major epidemiological factors associated with the disease, in order to take effective prevention of financial policy. Frequency and distribution are based on the number of patients in a given population within a given time and space. By analyzing the various characteristics of the population such as gender and age, the epidemiology of the disease is clarified in many aspects.