Table 3. Comparison of calculated ratios between observers.

Measurement	Mean difference	Lower limit of agreement (95%CI)	Upper limit of agreement (95%CI)
2 cm:base	−0.007	−0.072 (−0.083, −0.061)	0.058 (0.047, 0.069)
4 cm:base	0.002	−0.046 (−0.054, −0.038)	0.050 (0.042, 0.058)
6 cm:base	0.001	−0.035 (−0.041, −0.029)	0.037 (0.031, 0.043)
8 cm:base	−0.00005	−0.040 (−0.047, −0.033)	0.039 (0.032, 0.046)
10 cm:base	−0.004	−0.036 (−0.042, −0.031)	0.029 (0.023, 0.035)
15 cm:base	−0.001	−0.030 (−0.036, −0.025)	0.029 (0.023, 0.034)
Midshaft:base	−0.004	−0.050 (−0.059, −0.041)	0.041 (0.032, 0.050)

CI, confidence interval.