Table 3. Principle component analysis one the association between ethnicity and other significant associated factors.

		Partial Sum of Square	Relative Proportion (%)	P Value	Cumulative Principle Component Proportion	Number of components extracted
Mean CCT
	Ethnicity	52.32	56.5	<0.001	0.854	3
	Principal components	40.28	43.5	<0.001
CCT < 555 μm
	Ethnicity	59.45	60.0	<0.001	0.872	4
	Principal components	39.56	40.0	<0.001