Table 3.

Cut-off values for NH, FL and LAA

Maximum values n = 254
Test	Severely low arch	Low arch	Normal	High arch	Severely high arch
NH (cm)	< 2.7	2.7 to 3.5	3.6 to 5.5	5.6 to 6.4	> 6.4
FL (cm)	< -3.3	-3.3 to -2.5	-2.6 to -1.2	-1.3 to -0.4	> -0.4
LAA (°)	< 121	121 to 130	131 to 152	153 to 162	> 162
Range of motion values n = 254
Test	Very flexible	Flexible	Normal	Rigid	Very rigid
ND (cm)	> 2.3	2.3 to 1.8	1.8 to 0.6	0.6 to 0.0	< 0.0
FL (cm)	> 1.3	1.3 to 0.9	0.9 to -0.1	-0.1 to -0.6	< -0.6
LAA (°)	> 19	19 to 13	13 to -1	-1 to -7	< -7

Cut-off values of the medial longitudinal arch maximum values and range of motion values without taking into account the association between the variables included in the regression models with NH, FL, and LAA. In relation to maximum values and range of motion values, the normal categories were defined by the 68% prediction limit cut-offs. Low arch and high arched feet as well as flexible and rigid feet were categorized based on the 95% prediction limit cut-offs. NH: navicular height; FL: Feiss line; LAA: Longitudinal arch angle