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Mean, standard deviation (SD) and range of scanning time (s) for three QR code sizes tested (N = 2254).
| QR code size (mm) | Scanning time* | |||
|---|---|---|---|---|
| Mean | SD | Min | Max | |
| 35 | 2.03a | ± 0.31 | 1.25 | 3.42 |
| 40 | 1.98b | ± 0.29 | 1.05 | 3.13 |
| 75 | 1.90c | ± 0.29 | 1.00 | 2.94 |
a-cValues with different letters in the column are significantly different (*P < 0.05).
*Time interval needed to visualize information encoded to the QR code on the smart glasses M400 display.
