This application facilitates the measurement of objective functional impairment (OFI) by the use of the Timed Up and Go (TUG) test. Test results are displayed in seconds, as well as in T-scores, standardized for age and sex. OFI has been demonstrated to be a valuable additional metric in the comprehensive evaluation of patients with lumbar degenerative disc disease. An improvement of 3.4 seconds on the TUG test has been identified as clinically meaningful improvement of OFI.