Development of a five-year mortality model in systemic sclerosis patients by different analytical approaches.

Clinical and Experimental Rheumatology

Lorenzo Beretta¹  Patricia E. Carreira¹  Francesca Cappiello¹  Nitesh V Chawla¹  D.A. Popa-Diaconu¹  Alessandro Santaniello¹  Francesca Bertolotti¹  Antonino Mazzone¹  Marta Cossu¹  Yannick Allanore¹  Gianfranco Ferraccioli¹  Raffaella Scorza¹  Madelon C. Vonk¹ 

关键词: Systemic sclerosis;    survival;    Cox regression;    data mining;    Naïve Bayes;   

DOI  :  

学科分类：医学（综合）

来源: Pacini Editore SpA

【 摘 要 】

OBJECTIVES: Systemic sclerosis (SSc) is a multiorgan disease with high mortality rates. Several clinical features have been associated with poor survival in different populations of SSc patients, but no clear and reproducible prognostic model to assess individual survival prediction in scleroderma patients has ever been developed. METHODS: We used Cox regression and three data mining-based classifiers (Naïve Bayes Classifier [NBC], Random Forests [RND-F] and logistic regression [Log-Reg]) to develop a robust and reproducible 5-year prognostic model. All the models were built and internally validated by means of 5-fold cross-validation on a population of 558 Italian SSc patients. Their predictive ability and capability of generalisation was then tested on an independent population of 356 patients recruited from 5 external centres and finally compared to the predictions made by two SSc domain experts on the same population. RESULTS: The NBC outperformed the Cox-based classifier and the other data mining algorithms after internal cross-validation (area under receiving operator characteristic curve, AUROC: NBC=0.759; RND-F=0.736; Log-Reg=0.754 and Cox= 0.724). The NBC had also a remarkable and better trade-off between sensitivity and specificity (e.g. Balanced accuracy, BA) than the Cox-based classifier, when tested on an independent population of SSc patients (BA: NBC=0.769, Cox=0.622). The NBC was also superior to domain experts in predicting 5-year survival in this population (AUROC=0.829 vs. AUROC=0.788 and BA=0.769 vs. BA=0.67). CONCLUSIONS: We provide a model to make consistent 5-year prognostic predictions in SSc patients. Its internal validity, as well as capability of generalisation and reduced uncertainty compared to human experts support its use at bedside. Available at: http://www.nd.edu/~nchawla/survival.xls.

【 授权许可】

Unknown