| #1 | #2 | #3 | #4 | #5 | |
| Bias (LoA) | Bias (LoA) | Bias (LoA) | Bias (LoA) | Bias (LoA) | |
| % (%) | % (%) | % (%) | % (%) | % (%) | |
| #1 | +3 (37) | -6 (34) | -2 (33) | +0 (35) | |
| #2 | -3 (37) | -14 (37) | -9 (38) | -8 (35) | |
| #3 | +6 (34) | +14 (37) | +5 (34) | +6 (30) | |
| #4 | +2 (33) | +9 (38) | -5 (34) | +2 (30) | |
| #5 | +0 (35) | +8 (35) | -6 (30) | -2 (30) |
Bland-Altman results of the comparison of R5-values obtained with different FOT devices (row - column). Bias and Limits of Agreement (LoA) values are expressed relative to the average value of the two devices.