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Table 5 Correlation of creatinine estimates obtained with various equations

From: Sodium intake in Germany estimated from sodium excretion measured in spot urine samples

  Kawasaki [33] Tanaka [32] Toft [31] Johner [36]  
Kawasaki [33] - 0.533 0.984 0.268 women
(-0.091–0.810) (0.970–0.990) (0.101–0.403)
Tanaka [32] 0.813 - 0.570 0.083
(0.623–0.891) (-0.085–0.827) (0.034–0.130)
Toft [31] 0.937 0.870 - 0.284
(0.932–0.942) (0.588–0.940) (0.165–0.386)
Johner [36] 0.236 0.124 0.208 -  
(0.082–0.363) (0.086–0.161) (0.035–0.353)
  men   
  1. ICC matrix (with 95 % CI) of estimated daily creatinine excretion calculated using various methods stratified by sex