The correction of urine specific gravity for glucose involves subtracting 0.004 for each 1 g/dL of glucose from the temperature-corrected specific gravity.


Measurement of specific gravity: refractometer


correction factor for glucose =

= (urine glucose in g/dL) * 0.004


corrected urine specific gravity =

= (urine specific gravity corrected for temperature) - (correction factor for glucose)


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