Medical tests ordered on the day of hospital discharge have a high risk of not being followed up on by the ordering physician, reports Mei-Sing Ong, PhD in a research letter in the Archives of Internal Medicine on August 13th. Of 662,858 tests ordered for 6736 patients during their hospitalization, 3.1% of test results did not get reviewed before discharge. Two months later, half of those were still not reviewed. More than one-third of patients had at least one test result that was not reviewed prior to discharge. Most of the test results that went unreviewed were ordered on the day of discharge.