One of the 190 Chinese HIV/AIDS patients admitted to Beijing Ditan Hospital from February to May 2019 was ineligible because he was younger than 18 years old, and 17 of them were excluded because of missing values for serum cystatin C. Finally, 172 Chinese adult HIV/AIDS patients were enrolled, including 145 (84.3%) males and 27 (15.7%) females. The gene discussed is CST3; the disease is AIDS.