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.
|Fat||< 5 g/day in patients on a 100-g fat diet||—|
|Nitrogen||< 2 g/day||—|
|Urobilinogen||40–280 mg/24 h||68–473 mcmol/24 h|
|Weight||< 200 g/day||—|
***Test values are method dependent
***Test values vary with age
***Test values are diet-dependent