TABLE 3.

Regression coefficients of the moderating effect of cardiorespiratory fitness and sleep on high-interference memory, in young adults.

	Δ R2	b	SE b	95% CIs	p
	0.10				0.35
Nighttime awakenings		–0.65	1.00	(−2.71, 1.4)	0.53
Estimated VO2		13.22	21.48	(−30.94, 57.4)	0.54
Interaction		–0.17	1.190	(−2.44, 2.1)	0.88
	0.07				0.53
Sleep efficiency		0.90	1.85	(−2.9, 4.7)	0.63
Estimated VO2		73.39	156.50	(−248.31, 395.09)	0.64
Interaction		–0.71	1.73	(−4.25, 2.84)	0.69
	0.07				0.51
WASO		–0.14	0.48	(−1.13, 0.84)	0.77
Estimated VO2		–1.62	20.32	(−43.41, 40.17)	0.94
Interaction		0.48	0.23	(−0.71, 1.13)	0.64
	0.17				0.12
TST		0.08	0.09	(−0.10, 0.26)	0.37
Estimated VO2		–86.34	71.99	(−234.32, 61.64)	0.24
Interaction		0.23	0.17	(−0.12, 0.58)	0.19
	0.11				0.52
PSQI – global score		2.29	2.60	(−3.07, 7.7)	0.39
Estimated VO2		20.04	18.38	(−17.81, 57.9)	0.29
Interaction		–2.71	3.77	(−10.47, 5.0)	0.48

WASO, wake after sleep onset; TST, total sleep time; PSQI, Pittsburgh Sleep Quality Index. In all moderation models, cardiorespiratory fitness (estimated VO₂) served as the moderator, sleep acted as the independent variable, and memory performance acted the dependent variable. Covariates included sex, age, BMI, depression, and years of education.