Table 2

Distribution of BCHE genotypes in subjects aged between 65 and 74 years and 75 years and older

		⩾65–74 years^2-150				⩾75 years^2-151
		Cases						Controls		Cases				Controls
		No	%					No	%	No	%			No	%
NN	38	65.5		54	68.4		46	39.3		82	75.9
NK	19	32.8		25	31.6		69	59.0		23	21.3
KK	1	1.7		0	0		2	1.7		3	2.8

↵2-150 χ²=0.10, df=2, p=0.95.
↵2-151 χ²=33.02, df=2, p<<0.001.