| The main advantage is that observation of the true color reaction is
less affected by the inherent color of the urine itself. It is, therefore,
useful in confirming or refuting apparently positive reactions on the
dipstick in cases where the urine sample is deeply colored. It is also
more sensitive to bilirubin than the dipstick (detects 0.1 mg/dL of bilirubin).
At Cornell University, we confirm any positive Criterion bilirubin reactions
with the tablet test, this result being a more accurate assessment of
urinary bilirubin. Hence, if a positive reaction (regardless of the value)
is obtained on the dipstick, but the Icotest is negative, the result
for bilirubin should be interpreted on the basis of the Ictotest, and
not the dipstick result, i.e. the result for bilirubin is negative
(and the dipstick is a false positive value).
Purple color around the tablet is a