After the test Immediate post-test care None. Activity after test Resume taking any medications that were withheld before the test. Return to pretest activities right away. Time before test results available Test requires only a few minutes in the laboratory. Values peak between ages 11 and 18.
Values rise during the third trimester of pregnancy, reflecting fetal-skeletal growth.
Factors Affecting Results Taking these drugs may affect test results Ascorbic acid. Vitamin D. Other factors that may affect test results Psoriasis. Failure to follow dietary restrictions. Failure to collect all urine during the test period. Failure to store the specimen properly.