RESUMO
Objective To analyze the composing principles of herbs in prescriptions for treating nervous urinary frequency of children by using traditional Chinese medicine. Methods The prescriptions for treating nervous urinary frequency of children were searched in CNKI, VIP, Wanfang database to establish relevant database, and the composing principles were analyzed by using revised mutual information, complex system entropy cluster, and unsupervised hierarchical clustering in the TCM inheritance system after data entry. Results Based on the analysis of 117 entries in 63 cases of prescriptions, the frequency of 32 entries was more than 5 times;22 combinations contained 2 to 3 entries, including 10 entries in total 11 medicine association rules and their confidence coefficient were obtained, which leaded to 14 new core combinations and 7 new prescriptions. Conclusion Nervous urinary frequency of children is mainly treated with the tonification by Chinese herbal compound, in particular with the herbs which can nourish kidney and reduce urination. The new prescriptions were generated by TCM inheritance system, which need verification through clinical trials.