title: [Research of coptis effect on incidence of neonatal jaundice based on Cox model].
abstract: OBJECTIVE
  To learn the effects of coptis in treating neonatal jaundice and to find the index that guides the clinical administration of the medicine.
  
  
  METHODS
  Clinical data of 412 cases of neonatal jaundice were studied retrospectively, and univariate and multivariate analysis were made to the factors affecting the incidence according to the Cox model which led to the establishment of the predictive equation. According to the regression coefficients, the relative risk, wald value, the coptis effects were evaluated on the incidence of neonatal jaundice.
  
  
  RESULTS
  Single-factor Cox model analysis shows that there are five main factors affecting the incidence of neonatal jaundice, Multivariate Cox model analysis indicates that the five main factors are also independent factors that affect the incidence, the roles of which, ranking from minor to major are, in turn, age, applied coptis, ethnic, G6PD deficiency and cesarean section. Among them, the regression coefficient is -0.259, relative risk 0.772, wald value 6.832. It sugguests that coptis may reduce the incidence of neonatal jaundice, and that it is a protective factor. The prediction equation, by regression coefficients, which has been used to establish the incidence of neonatal jaundice, is as following: h(t, x) = h0 (t) exp (- 0.022 x2 - 0.494x3 + 0.344x8 + 0.226x9 - 0.259x10).
  
  
  CONCLUSIONS
  Coptis is one of the important factors that affect the occurrence of neonatal jaundice, and it has a protective effect in preventing neonatal jaundice from occurrence.
authors: Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China. wrt135@163.com
authors: Rongtian
authors: R
authors: Wang
authors: Na
authors: N
authors: Lin
mesh_terms: D039323:Coptis / Q000737:chemistry*; D004365:Drugs, Chinese Herbal / Q000008:administration & dosage* / Q000009:adverse effects; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007567:Jaundice, Neonatal / Q000188:drug therapy*; D008297:Male; D016016:Proportional Hazards Models; D012189:Retrospective Studies
chemical_list: D004365:Drugs, Chinese Herbal