Table 2.

Prediction models for urine osmolality for reagent strip and osmolality

For reagent strip, the prediction model is:

Urine Osmolality=100×(−183.22+181.63×SG+0.42×pH +0.57×Glucose+0.57×Ketones−0.49×Bilirubin+0.30×Urobilinogen−0.33×Protein)

According to this model, when all other variables are constant, each change of 0.01 in specific gravity will increase or decrease the predicted osmolality by 182

For refractometry the prediction model is:

Urine Osmolality=100×(−202.26+203.39×SG+0.36×Ketones−0.69×Bilirubin−0.22×Hemoglobin)

In this model, when all other variables are constant, each change of 0.01 in specific gravity will increase or decrease the predicted osmolality by 203