Table 4.

Test criteria for KMO statistics.

KMO	Factor analysis of fitness
KMO > 0.9	Very suitable
0.8 < KMO < 0.9	Relatively suitable
0.7 < KMO < 0.8	Suitable
0.6 < KMO < 0.7	Not suitable
0.5 < KMO < 0.6	Very poor
KMO < 0.5	Not suitable