Table 2.

Manually versus Automatically determined radial distances.

Manually			Automatically	Mean diff	Std. error mean	p-value	Effect size (Cohen’s D)
Outer wall	Degrees	Mean (mm), SD	Mean (mm), SD
1	0	5.60, 0.39	5.62, 0.40	−0.021	0.001	0.037	0.05
2	90	3.96, 0.31	4.01, 0.30	−0.042	0.012	<0.001	0.16
3	180	3.33, 0.29	3.35, 0.30	−0.014	0.012	0.032	0.07
4	270	2.81, 0.29	2.77, 0.27	0.064	0.013	<0.001	0.14
Inner wall
1	0	3.41, 0.31	3.23, 0.33	0.177	0.009	<0.001	0.58
2	90	2.03, 0.28	1.76, 0.26	0.283	0.012	<0.001	0.96
3	180	1.45, 0.27	1.29, 0.28	0.309	0.014	<0.001	0.59
4	270	0.94, 0.23	0.95, 0.27	0.290	0.013	0.002	0.04