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. 2020 Jun 3;8(6):e16648. doi: 10.2196/16648

Table 3.

Transformation of TMED system usability scale scores into percentile ranks, adjectives, and grades for patients, physicians, and pharmacists.

Parameters Patients Physicians Pharmacists
System usability scale score, mean (SD) 72.67 (15.36) 76.85 (17.23) 84.87 (11.62)
Percentage 66.9 88.0 96.6
Adjective Good Excellent Excellent
Grade (Bangor [52]) C B B
Grade (Sauro & Lewis [53]) B– A– A+