Fig. (7) Bland and Altman plots of mean differences (vertical axis) versus means (horizontal axis) of radial deviation ROM measures by two digital goniometers: (A) rater one, (B) rater two. The middle line shows the mean difference between measures taken with two digital goniometers (NK-JTech). The lines above and below mean difference represent range of measurement error with 95% confidence interval (data in degrees).