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Table 5 Summary of add-on tests

From: Impact of add-on laboratory testing at an academic medical center: a five year retrospective study

Total number of add-ons 880,359
Unique ordering instances1 443,411
Number of patients 96,244
Average number of add-on tests per unique ordering instance 1.99
Average number of add-on tests per patient2 9.15
Estimated hours per day of manual effort for add-on testing prior to introduction of robotic archival storage/retrieval unit 30.7
Estimated hours per day of manual effort for add-on testing with use of robotic archival storage/retrieval unit 6.6
  1. 1These are unique add-on orders at a specific time
  2. 2This includes all add-on tests per each patient, which may span multiple unique ordering instances