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Comparisons of Prediction Models of Quality of Life after Laparoscopic Cholecystectomy: A Longitudinal Prospective Study

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  • Hon-Yi Shi
  • Hao-Hsien Lee
  • Jinn-Tsong Tsai
  • Wen-Hsien Ho
  • Chieh-Fan Chen
  • King-Teh Lee
  • Chong-Chi Chiu

Abstract

Background: Few studies of laparoscopic cholecystectomy (LC) outcome have used longitudinal data for more than two years. Moreover, no studies have considered group differences in factors other than outcome such as age and nonsurgical treatment. Additionally, almost all published articles agree that the essential issue of the internal validity (reproducibility) of the artificial neural network (ANN), support vector machine (SVM), Gaussian process regression (GPR) and multiple linear regression (MLR) models has not been adequately addressed. This study proposed to validate the use of these models for predicting quality of life (QOL) after LC and to compare the predictive capability of ANNs with that of SVM, GPR and MLR. Methodology/Principal Findings: A total of 400 LC patients completed the SF-36 and the Gastrointestinal Quality of Life Index at baseline and at 2 years postoperatively. The criteria for evaluating the accuracy of the system models were mean square error (MSE) and mean absolute percentage error (MAPE). A global sensitivity analysis was also performed to assess the relative significance of input parameters in the system model and to rank the variables in order of importance. Compared to SVM, GPR and MLR models, the ANN model generally had smaller MSE and MAPE values in the training data set and test data set. Most ANN models had MAPE values ranging from 4.20% to 8.60%, and most had high prediction accuracy. The global sensitivity analysis also showed that preoperative functional status was the best parameter for predicting QOL after LC. Conclusions/Significance: Compared with SVM, GPR and MLR models, the ANN model in this study was more accurate in predicting patient-reported QOL and had higher overall performance indices. Further studies of this model may consider the effect of a more detailed database that includes complications and clinical examination findings as well as more detailed outcome data.

Suggested Citation

  • Hon-Yi Shi & Hao-Hsien Lee & Jinn-Tsong Tsai & Wen-Hsien Ho & Chieh-Fan Chen & King-Teh Lee & Chong-Chi Chiu, 2012. "Comparisons of Prediction Models of Quality of Life after Laparoscopic Cholecystectomy: A Longitudinal Prospective Study," PLOS ONE, Public Library of Science, vol. 7(12), pages 1-8, December.
    • Handle: RePEc:plo:pone00:0051285
    DOI: 10.1371/journal.pone.0051285
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    1. Satwant Kumar & Madhu Lata Rana & Khushboo Verma & Narayanjeet Singh & Anil Kumar Sharma & Arun Kumar Maria & Gobind Singh Dhaliwal & Harkiran Kaur Khaira & Sunil Saini, 2014. "PrediQt-Cx: Post Treatment Health Related Quality of Life Prediction Model for Cervical Cancer Patients," PLOS ONE, Public Library of Science, vol. 9(2), pages 1-8, February.

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