Predicting Prolonged Length of Hospital Stay for Peritoneal Dialysis–Treated Patients Using Stacked Generalization: Model Development and Validation Study

Guilan Kong   ^{1, 2 *} , PhD ;   Jingyi Wu   ^{2 *} , MS ;   Hong Chu   ³ , MD, PhD ;   Chao Yang   ³ , MS ;   Yu Lin   ⁴ , MPH ;   Ke Lin   ¹ , MS ;   Ying Shi   ⁵ , BMS ;   Haibo Wang   ^{1, 6} , MSc, MPH, MBBS ;   Luxia Zhang   ^{1, 2, 3} , MPH, MD

¹ National Institute of Health Data Science, Peking University, Beijing, China

² Advanced Institute of Information Technology, Peking University, Hangzhou, China

³ Renal Division, Department of Medicine, Peking University First Hospital, Peking University Institute of Nephrology, Beijing, China

⁴ Department of Medicine and Therapeutics, LKS Institute of Health Science, The Chinese University of Hong Kong, Hong Kong, China

⁵ China Standard Medical Information Research Center, Shenzhen, China

⁶ Clinical Trial Unit, First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China

*these authors contributed equally