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Analysis on hospitalization expense and its influencing factors based on BP neural network among patients with cholelithiasis

SONG Zhen,LI Chang-ping,CUI Zhuang,MA Jun Department of Health Statistics,Public Health College, Tianjin Medical University,Tianjin 300070,China  
Objective To analyze the hospitalization costs and its influencing factors among patients with cholelithiasis based on BP neural network and,to evaluate the effect of this network on predicting the costs of insured hospitalized patients.Methods Data of 4205 patients with medical insurance were retrieved from hospital database recorded from 2003 to 2007 in Tianjin city.The overall hospitalization costs were analyzed using single factor analysis and BP artificial neural network model.Results The overall cost of insured hospitalized patients with cholelithiasis increased from the year of 2003 to 2007(F=11.818,P=0.001).Single-factor analysis showed that age,days of hospitalization,hospital grade,frequency of admission,comorbidity,position of calculus,position of inflammation and operation were all the influencing factors of cost(P0.01).The sensitivity analysis showed that the factor influencing hospitalization expense the most was admission days(0.492)and the least was comorbidity(0.023).Conclusions The hospitalization cost of insured patients with cholelithiasis is going up and several factors could influence this cost especially admission days.Neural network model can be applied to the identification,assessment,prediction and control of hospital expenses for patients with cholelithiasis.
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