TABLE 4.

Slow wave and spindle event counts, and mean number of bins exceeding a threshold of 80% composition of the late-fast subtype, for younger and older adults from the Cleveland family study.

Age group	Mean total slow waves (SD)	Mean early-fast spindles (SD)	Mean late-fast spindles (SD)	Mean coupled early-fast + slow waves (SD)	Mean coupled late-fast + slow waves (SD)	Mean number of bins ≥ 80% (SD)
Younger adults	5,128.67 (1556.93)	3,020.23 (736.80)	3,355.67 (792.60)	1,176.93 (422.75)	1,363.43 (500.76)	2.9 (3.03)
Older adults	4,111.10 (1145.40)	2,198.43 (455.41)	2,404.00 (568.77)	757.97 (244.63)	1,008.93 (360.52)	10.9 (7.79)

SD, standard deviation.