Table 1. Distribution of APOE allele frequencies in glaucoma patients and matched controls.

Allele	Glaucoma (n=200)		Control (n=260)		p value	RR	EF*/PF
	Number	Frequency (%)	Number	Frequency (%)
ε4	19	9.5	11	4.2	0.034	2.169	0.329*
ε3	181	90.5	249	95.7	0.034	0.473	0.318
ε2	0	0	0	0	-	-	-

Number of subjects=n. Values with  asterisk (last column) correspond to etiological fraction (EF) while values without asterisk indicate  protective fraction (PF).