证候要素研究是对证候规范化研究的深化,是构建辨证方法新体系的基础；通过对艾滋病证候要素及其组合规律的研究，探索艾滋病的病机变化，补充和完善该病中医辨证论治体系。本课题拟选择未治疗过的艾滋病Ⅰ、II、Ⅲ期患者900例（每期各300例），应用临床流行病学调查方法开展一对一问卷调查及运用舌面脉信息采集体质辨识系统采集四诊信息，提取证候要素，对其中200例追踪观察2年，探索艾滋病三期的症状、证候、证候要素及其组合规律和生物学指标的变化，为临床更好地把握该病的发生发展及辨证施治提供依据。

The research on TCM symptoms &factors deepens the research of Symptom standardization and is the basis of a new system of Symptom differentiation methods; and through the research of HIV/AIDS symptoms &factors and their developing regulations,the pathogenesis of HIV/AIDS can be explored and the symptom differentiation and treatment system of TCM can be supplemented and perfected. This theme will select 900 cases of HIV/AIDS patients respectively in Phase I, II and III who never accepted the treatment (300 cases in each phase), apply the clinical epidemiological method to carry out one-on-one questionnaire, employ the constitution identification system for lingual vein infromation collection to collect the information of four examination methods and extract the symptoms &factors, follow 200 cases for two years, and explore the symptoms, syndromes and symptoms &factors in three phases of HIV/AIDS and their as well as the developing regulations changes of biological indicators, thereby providing basis for better mastering the occurrence and development of HIV/AIDS and treatment determination based on syndrome differentiation in clinical application.