Table 5. The relevance between 11 indices and F1–F5.

	F1	F2	F3	F4	F5
EAI	0.96	0.19	0.09	0.08	0.08
WBV 5/s	0.93	0.22	0.14	0.05	−0.06
WBV 30/s	0.90	0.08	0.21	0.35	−0.07
WBV 50/s	0.90	0.16	0.09	0.35	0.10
WBV 150/s	0.87	0.16	0.24	0.36	0.04
RCEI	0.71	0.67	0.18	−0.10	−0.08
MPAR	0.20	0.94	0.04	0.25	0.13
APTT	0.16	0.04	0.96	−0.05	−0.16
PV	0.34	0.17	0.64	0.63	−0.04
WBV 200/s	0.60	0.31	−0.19	0.70	0.05
PT	0.03	0.08	−0.14	0.01	0.99
Variance contribution %	61.61	14.20	8.68	7.25	6.26
Variance contribution Accumulated %	61.61	75.81	84.49	91.74	98.00

a) F1–F5 represents Factor 1–5 respectively.

b) Variance contribution means how much the corresponding factor reflects the original data.

c) The larger the absolute value, the higher the relevance between indices and factors. This table is helpful to reveal the clinical importance of each factor.