TABLE 1.

ZERO-ORDER CORRELATION MATRIX OF THE VARIABLES OF INTEREST

	Age	AHI	BMI	GCA	VAB	NAB	SAB
Age	1
AHI	0.00	1
BMI	0.22*	0.22*	1
GCA	0.07	−0.16*	−0.11*	1
VAB	0.10	−0.13*	−0.12*	0.82*	1
NAB	0.12*	−0.18*	−0.08	0.83*	0.50*	1
SAB	−0.07	−0.07	−0.07	0.77*	0.43*	0.54*	1

Definition of abbreviations: AHI = apnea-hypopnea index; BMI = body mass index; GCA = general cognitive abilities; NAB = nonverbal abilities; SAB = spatial abilities; VAB = verbal abilities.

^*Significant results at P < 0.05.