Associations between Anemia and Glomerular Filtration Rate and Albuminuria in Korean Adults by Metabolic Syndrome Status: Analysis of KNHNES V-3 Data

The present study was conducted to explore relationships between anemia and estimated glomerular filtration rate (eGFR) and urine microalbumin/creatinine ratio (uACR) in Korean adults with or without metabolic syndrome (MetS).The data of 4,943 adults aged ≥20 years who participated in KNHNES V-3 (2012) were analyzed.In the non-MetS group, the odds ratio (OR) for anemia of those with a decreased eGFR {eGFR＜60 mL/min/1.73m 2 , 3.85 (95% confidence interval [CI], 2.03∼ 7.30)} was significant as was the OR of those with decreased eGFR plus elevated uACR (eGFR＜60 mL/min/1.73m 2 and uACR≥30 mg/g, 5.81 [95% CI, 2.60∼13.02]).In the MetS group, ORs for anemia for those with an elevated uACR (2.18 [95% CI, 1.11∼4.27]),a decreased eGFR (3.74 [95% CI, 1.11∼ 12.55]), or a decreased eGFR plus an elevated uACR (16.79 [95% CI, 5.93∼47.57])were significant.In conclusion, in non-MetS, anemia was associated with a low eGFR, whereas in MetS, anemia was associated with a low eGFR and an elevated uACR.In addition, the OR for anemia was greatly increased when eGFR was diminished and uACR was elevated regardless of MetS and MetS status.