Table 3.

Correlation between subjects factors and first six PCs

	Sex ρ (p)	Age ρ (p)	Shoe size ρ (p)	Frequency of sport activity ρ (p)	BMI ρ (p)	Foot asymmetry ρ (p)	Foot loading ρ (p)
PC1	0.72*(0.001)	-0.019 (0.761)	0.60*(< 0.001)	0.19*(0.002)	0.0574 (0.368)	-0.0253 (0.691)	-0.26*(< 0.001)
PC2	-0.33*(< 0.001)	0.2246*(< 0.001)	-0.23*(0.002)	-0.0452 (0.478)	0.16*(0.011)	0.045 (0.480)	0.14*(0.024)
PC3	0.0113 (0.860)	-0.122 (0.054)	0.17*(0.008)	0.24*(< 0.001)	-0.53*(< 0.001)	0.0871 (0.171)	0.06578 (0.302)
PC4	-0.067 (0.291)	-0.1164 (0.067)	0.00789 (0.901)	0.0174 (0.785)	-0.13*(0.033)	0.08831 (0.166)	0.26*(< 0.001)
PC5	0.01847 (0.772)	-0.0192 (0.764)	-0.0363 (0.570)	-0.0887 (0.164)	0.17*(0.007)	0.14*(0.025)	0.06364 (0.318)
PC6	0.0018 (0.978)	-0.0068 (0.915)	-0.06156 (0.334)	-0.23*(< 0.001)	0.01258 (0.844)	-0.24*(< 0.001)	0.05232 (0.412)

^*Significant at the 0.05 probability level