Table 2. Diagnostic validity of digital navicular drop test equipment (n=52)

		NDT	D-NDT	r	p
Normal group (n=26)	Sitting (mm)	42.83±7.22	42.40±8.01	0.938	<0.001
	Standing (mm)	39.68±7.55	39.89±7.99	0.926	<0.001
	Difference (mm)	3.15±1.84	3.65±2.17	0.650	<0.001
Pes planus group (n=26)	Sitting (mm)	42.87±6.69	42.81±6.45	0.980	<0.001
	Standing (mm)	31.83±6.60	35.77±6.48	0.977	<0.001
	Difference (mm)	11.04±0.99	10.46±0.72	0.740	<0.001

NDT, navicular drop test; D-NDT, digital navicular drop test equipment.