Comorbidities of prurigo nodularis in Chinese patients:A multicenter retrospective study

Prurigo nodularis(PN),as a subtype of chronic prurigo(CPG),is characterized by nodular lesions and severe pruritus,which signicantly affect patients’quality of life.[1]It has been observed that patients with PN often have comorbidities,including physical and mental diseases.[2]However,information on comorbidities in Chinese PN patients is lacking.This study aims toll this gap by using a representative patient population to provide comprehensive data on comorbidities in Chinese patients with PN.

Machine and deep learning-based clinical characteristics and laboratory markers for the prediction of sarcopenia

Background:Sarcopenia is an age-related progressive skeletal muscle disorder involving the loss of muscle mass or strength and physiological function.Efficient and precise AI algorithms may play a significant role in the diagnosis of sarcopenia.In this study,we aimed to develop a machine learning model for sarcopenia diagnosis using clinical characteristics and laboratory indicators of aging cohorts.Methods:We developed models of sarcopenia using the baseline data from the West China Health and Aging Trend(WCHAT)study.For external validation,we used the Xiamen Aging Trend(XMAT)cohort.We compared the support vector machine(SVM),random forest(RF),eXtreme Gradient Boosting(XGB),and Wide and Deep(W&D)models.The area under the receiver operating curve(AUC)and accuracy(ACC)were used to evaluate the diagnostic efficiency of the models.Results:The WCHAT cohort,which included a total of 4057 participants for the training and testing datasets,and the XMAT cohort,which consisted of 553 participants for the external validation dataset,were enrolled in this study.Among the four models,W&D had the best performance(AUC=0.916±0.006,ACC=0.882±0.006),followed by SVM(AUC=0.907±0.004,ACC=0.877±0.006),XGB(AUC=0.877±0.005,ACC=0.868±0.005),and RF(AUC=0.843±0.031,ACC=0.836±0.024)in the training dataset.Meanwhile,in the testing dataset,the diagnostic efficiency of the models from large to small was W&D(AUC=0.881,ACC=0.862),XGB(AUC=0.858,ACC=0.861),RF(AUC=0.843,ACC=0.836),and SVM(AUC=0.829,ACC=0.857).In the external validation dataset,the performance of W&D(AUC=0.970,ACC=0.911)was the best among the four models,followed by RF(AUC=0.830,ACC=0.769),SVM(AUC=0.766,ACC=0.738),and XGB(AUC=0.722,ACC=0.749).Conclusions:The W&D model not only had excellent diagnostic performance for sarcopenia but also showed good economic efficiency and timeliness.It could be widely used in primary health care institutions or developing areas with an aging population.Trial Registration:Chictr.org,ChiCTR 1800018895.