Table 2.

Trueness values (μm) of IOSs at each cylinder position in XYZ axes.

χ², chi-square; df, degrees of freedom; p, p-value.

Interquartile ranges [1st quartile, 3rd quartile] are in parentheses.

Different uppercase letters within the same column indicate statistically significant differences among cylinder positions; different lowercase letters within the same row indicate statistically significant difference among IOSs (multiple comparison by Mann–Whitney U test with Bonferroni correction) (p < 0.05).

Positive (in blue shade) and negative values (in red shade) indicate deviation to the right and left in X-axis, forwards and backwards in Y-axis, upwards and downwards in Z-axis, respectively.

Absolute values were used for statistical analysis.