Reference values vary based on several factors, including the specific laboratory that supplies them. A patient's stool test values should be interpreted based on the reference value of the laboratory in which the test was done; the laboratory typically provides these values with the test result. These values are listed in alphabetical order in the following table.
Table
Representative Laboratory Reference Values: Stool
Test | Conventional Units | SI Units |
|---|---|---|
Fat | < 5 g/day in patients on a 100-g fat diet | — |
Nitrogen | < 2 g/day | — |
Urobilinogen | 40–280 mg/24 hours | 68–473 mcmol/24 hours |
Weight | < 200 g/day | — |
