Table 1.

Age and total brain volume (TBV)

	Matched sample (n = 48)		Extreme sample (n = 48)
	Men (n = 24)	Women (n = 24)	Men (n = 24)	Women (n = 24)
Age	42.96 ± 12.31	43.88 ± 14.74	39.33 ± 14.79	45.75 ± 13.64
TBV	1406.57 ± 101.69	1406.62 ± 101.41	1623.74 ± 68.94	1221.58 ± 62.99

Age (mean ± SD) is shown in years; TBV (mean ± standard deviation) is shown in milliliters. Matched men and matched women do not differ with respect to TBV. Extreme men consist of men with the largest TBVs; extreme women consist of women with the smallest TBVs.