目的 探讨女性性工作者（FSWs）获取获得性免疫缺陷综合征（艾滋病)的知识途径与人口学特征的关系。方法 采用Apriori算法挖掘FSWs人口学特征与获取知识途径之间的关联规则，通过设置最小支持度和置信度，并结合作用度、置信度提升及χ2检验进行规则的剪除。结果 FSWs获取艾滋病知识的主要途径为电视（69.18%）、宣传资料（47.61%）、医生（39.87%）、报刊（33.18%）和网络（27.54%）。通过规则的剪除和筛选，最终得到12条关于人口学特征与电视、网络、报刊、医生和宣传资料之间的规则，如已婚、城市户籍和收入中等的FSWs倾向于通过电视获取艾滋病知识（支持度为3.80%，置信度为85.29%）。结论 不同人口学特征的FSWs获取艾滋病知识的途径存在差异，根据FSWs人口学特征选择具有针对性的健康教育方式，对更广泛地普及艾滋病知识、提高艾滋病健康教育的效率具有重要意义。

Objective To investigate the relationship between demographic characteristics and means to obtain knowledge of human immunodeficiency virus/acquired immunodeficiency syndrome (HIV/AIDS) among female sex workers (FSWs). Methods The association rules between means to obtain knowledge and demographic characteristics among FSWs were explored by Apriori algorithm. Rules were pruned by establishing the minimum support and confidence, improving the lift and confidence, and adding Chi-square test. Results The main means for FSWs to obtain knowledge of HIV/AIDS were television (69.18%), publicity materials (47.61%), doctors (39.87%), newspapers (33.18%) and internet (27.54%). After screening, 12 rules were acquired on the association between the demographic characteristics and television, internet, newspapers, doctors and publicity materials. For instance, married FSWs of urban household with medium income tended to obtain knowledge by the means of television (support, 3.80%; confidence, 85.29%). Conclusion FSWs with different demographic characteristics vary in means to obtain knowledge of HIV/AIDS. Choosing appropriate health education methods for FSWs based on demographic characteristics may play an important role in disseminating knowledge of HIV/AIDS and improving the efficiency of health education.