history of present illness

23 GHB cases and 100 controls were selected from hospitals in Tanggu District in Tianjin through July.2001 to Dec.2002. The questionnaire was used to obtain the information of subjects which includes demographic characteristics, history of past illness, history of present illness, psychological and social factors > obstetrics factors and some other variables.
方法 本研究采用病例对照研究方法对天津市塘沽地区2001年7月～2002年12月期间接受产前健康检查的孕妇，其中病例组23例，对照组100例，进行流行病学问卷调查，获得一般特征、现病史、既往史、心理-社会因素、产科特征及相关因素。