[Stages of 3,547 patients with chronic kidney disease and relevant factor analysis]

To investigate the prevalence and distribution of chronic kidney disease(CKD) in Second Xiangya Hospital of Central South University.

We retrospectively analyzed the medical records of 3547 CKD patients (>or=14 years old) admitted to Second Xiangya Hospital for the 1st time from January 2003 to December 2008. Glomerular filtration rate (GFR) was estimated by using the MDRD equation abbreviated [eGFR=186.3*SCr-1.154*age-0.203*0.742 (for women) mL/min.1.73 m2]. Data of patients' gender, age, admission number, etiologic and functional diagnose, course of disease, blood pressure, hemoglobin, urine, renal function, blood albumin, and kidney ultra-B were collected.

(1) The most common causes for CKD were primary glomerulonephritis(55.20%), hypertension (14.55%) and diabetes (11.78%). The composition of the causes during this 6 years was not significantly different (P>0.05). The proportion of chronic glomerulonephritis declined while that of hypertensive nephropathy and diabetic nephropathy increased as time passed. (2) Patients were respectively distributed from stage 3 to stage 5 at the following percentages: 11.59% (stage 3), 23.03% (stage 4), and 65.38% (stage 5). Middle-aged and young patients (41 years60 years) accounted for 36.88% of the CKD patients. Chronic glomerulonephritis was often seen at 21-40 and 41-60 year olds. Patients with lupus nephritis were younger, 48.35% of whom were 21-40 years old. On the contrary, patients with hypertensive nephropathy and diabetic nephropathy were much older. They were mainly seen in older than 40 year groups. (3) Obstructive nephropathy and gout nephropathy occurred mainly in men while it seemed much easier for women to suffer from lupus nephritis. (4) The majority of CKD patients was accompanied by anemia (94.28%) and hypertension (56.91%), and the incidence and degree of anemia and hypertension increased as CKD developed (P<0.005).

The top 3 causes of CKD are chronic glomerulonephritis, hypertensive nephropathy, and diabetic nephropathy. The proportion of hypertensive nephropathy and diabetic nephropathy is on the rise. Elderly people are the high risk group for CKD.