Carrieri et al developed an equation to correlate urine specific gravity with urine creatinine concentration. The authors are from Universita di Padova in Italy.



(1) urine specific gravity

(2) urine creatinine concentration in g/L


urine specific gravity =

= (0.0098 * LN(urine creatinine in g/L)) + 1.0178


If this is rearranged:


urine creatinine =

= EXP(((urine specific gravity) - 1.0178) / 0.0098)


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