[Study on the application of Back-Propagation Artificial Neural Network used the model in predicting preterm birth].

Objective To establish a practical and effective model in predicting the premature birth,using the Back-Propagation Artificial Neural Network (BPANN).Methods This was a prospective cohort study.Data was gathered from pregnant women selected by cluster sampling method from 2010 to 2012 in Liuyang city,Hunan province and was randomly divided into training sample (to establish the prediction models),validation sample (to select the optimal network) and testing sample (to evaluate the prediction models) by ratio of 2 ∶ 1∶ 1.BPANN and logistic regression analysis were used to establish models while ROC was applied to evaluate the ‘prediction models'.Results Among the 6 270 pregnant women,265 premature births were seen,with the premature incidence as 4.22％.The 7 variables which entered into the forecasting model would include abnormal uterine or uterine deformity,parity,number of pregnancies,gestational hypertension,placenta previa,premature rupture of membrane and regular prenatal examination.Sensitivity,specificity,agreement rate and area under the ROC curve of BPANN were 67.65％,84.87％,84.12％ and 0.795,respectively.However,the sensitivity,specificity,agreement rate and area under the ROC curve of logistic regression were 64.71％,85.60％,84.69％ and 0.783,respectively.Conclusion The newly established BPANN model was practical and reliable,which proved that this model was slightly better than the logistic regression in the prediction of premature birth. Key words: Premature birth;  Neural network;  Prediction