Table 1.

Apolipoprotein E allele frequencies of normal tension glaucoma (NTG) subjects and controls

Allele	NTG		Controls
	No	Frequency	No	Frequency
2	28	0.090	56	0.080
3	229	0.739	534	0.765
4	53	0.171	108	0.155
Total	310	1.000	698	1.000