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Table 2 Odds ratios (OR) and 95% confidence intervals (CI) for anemia in relation to glomerular filtration rate (GFR) levels

From: Associations between renal impairment and anemia in older, rural Japanese men: the Nagasaki Island study

  Non-chronic kidney diseased Chronic kidney diseasec P
Normal renal functiona   Mild renal impairmentb
Number at risk 109   645 351  
Number of cases (percentage) 26 (23.9)   63 (9.8) 73 (20.8)  
Age-adjusted OR   1.00   1.54 (1.08 to 2.20) 0.016
  1.00   0.26 (0.16 to 0.45) 052 (0.30 to 0.89) 0.967
Multivariable OR   1.00   1.81 (1.23 to 2.68) 0.003
  1.00   0.26 (0.15 to 0.47) 0.60 (0.33 to 1.09) 0.644
  1. aNormal renal function, bmild renal impairment, and cchronic kidney disease (CKD) were defined as respectively, GFR ≥90 mL/min/1.73 m2, 90 mL/min/1.73 m2 > GFR ≥60 mL/min/1.73 m2, and GFR <60 mL/min/1.73 m2. dNon-chronic kidney disease includes normal renal function and mild renal impairment. Anemia: hemoglobin in level <13.0 g/dL. Multivariable OR: adjusted further for age, systolic blood pressure, antihypertensive medication use, body mass index, smoking, alcohol intake, diabetes, history of cardiovascular disease, serum HDL cholesterol, serum triglycerides (TG), serum aspartate aminotransferase (AST), and serum γ-glutamyltranspeptidase (γGTP).