Table 3. The mean and standard deviation of normalised brain volume in each age group in the normal and AD samples.

Sample	Age	n	Mean	SD
Normal	<70	25	0.7555	0.0130
	70-74	89	0.7569	0.0196
	75-79	56	0.749	0.0204
	80-84	34	0.7418	0.0193
	85-89	23	0.73592	0.0210
AD	<70	43	0.7399	0.0236
	70-74	56	0.7350	0.0208
	75-79	49	0.7330	0.0209
	80-84	49	0.7292	0.0199
	85-89	22	0.71285	0.0187

Note: SD=standard deviation.