Table 3.

Differences between foot dimensions obtained with 3D foot scanner and corresponding shoe last dimensions

	3D foot scanner mean (95% CI)	Shoe last mean (95% CI)	Mean difference (95% CI)*	p value
Length	255.0 (250.3 to 259.7)	278.7 (273.3 to 284.0)	23.6 (22.1 to 25.2)	<0.001
Ball width	93.8 (92.2 to 95.4)	95.6 (93.6 to 96.7)	1.4 (−0.1 to 2.9)	0.066
Ball girth	260.4 (254.4 to 266.3)	259.7 (255.1 to 264.3)	−0.7 (−6.1 to 4.8)	0.810

CI = confidence interval.

*positive value indicates shoe dimension larger than foot.