title: Investigation of the prevalence of CKD in 13,383 Chinese hospitalised adult patients.
abstract: BACKGROUND
  There is an increase prevalence of chronic kidney disease (CKD)worldwide. However, the exact incidence of CKD in China is still uncertain. In this cross-sectional study, we retrospectively investigated the prevalence and distribution of CKD in Chinese hospitalised adult patients.
  
  
  METHODS
  Totally, 13,383 adults patients who were hospitalised at our hospital were included in this study. They included 6215 males and 7168 females. Patients' gender, age, blood pressure, serum creatinine, blood urea nitrogen, uric acid, triglyceride, total cholesterol, albumin, hemoglobin, hemotocrit, urine protein, and history of hypertension, diabetes, and smoking were investigated. CKD was defined as eGFR<60 ML/ MIN PER 1.73 m(2) and/or proteinuria, GFR was estimated by using of the simplified MDRD equation.
  
  
  RESULTS
  The prevalence rate of CKD was 14.82% in our group, which was respectively distributed from 1 to stage 5 at the following percentage, 3.33% (stage 1), 2.49% ( stage 2), 7.07% (stage 3), 1.08% (stage 4), and 0.86% (stage 5). Elderly patients (age >65 y) accounted for 53.07%, which had a higher CKD prevalence (29.47%) than middle and young-aged patients (9.49%). It was noted that 39.06% patients at stage 1-3 were undiagnosed with CKD during their hospitalization. The common etiology for CKD was hypertension (29.49%), diabetes (11.64%) and primary glomerulonephritis (4.39%). Hypertension, diabetes and ages were main associated factors for CKD.
  
  
  CONCLUSIONS
  CKD is a very common disease among the hospitalised patients in China. With the increasing of aging population, elderly people will be the highest risk group for CKD. More strategies have to be made for its early detection and prevention.
authors.affiliation: Division of Nephrology and Institute of Nephrology, Zhong Da Hospital, Southeast University, Nanjing, Jiangsu, 210009, China. liubc64@yahoo.com.cn
authors.forename: Bi-Cheng
authors.initials: BC
authors.lastname: Liu
authors.forename: Xiao-Chun
authors.initials: XC
authors.lastname: Wu
authors.forename: Yan-Li
authors.initials: YL
authors.lastname: Wang
authors.forename: Bei
authors.initials: B
authors.lastname: Wang
authors.forename: Jun
authors.initials: J
authors.lastname: Gao
authors.forename: Qing-Juan
authors.initials: QJ
authors.lastname: Zhang
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhu
authors.forename: Xiao-Liang
authors.initials: XL
authors.lastname: Zhang
authors.forename: Lian-Fang
authors.initials: LF
authors.lastname: Yin
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002681:China / Q000453:epidemiology; D005260:Female; D005919:Glomerular Filtration Rate; D006760:Hospitalization; D006801:Humans; D007297:Inpatients; D007676:Kidney Failure, Chronic / Q000453:epidemiology* / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012189:Retrospective Studies