Table 5.

Results of the hierarchical multiple linear regression analysis investigating the possible predictors of the delay recall ability (i.e., Selective Reminding Test—D score). Adjusted R² and F-statistics are reported for each model. Standardized Beta, t-values, p-values, and partial r correlation coefficients are reported for each predictor in each model. BMI: body mass index; AHI: apnea-hypopnea index; % Time SpO₂ < 90%: cumulative time spent with peripheral blood oxygen saturation (SpO₂) below 90%; STAI-Y2: State-Trait Anxiety Inventory form Y2; BDI: Beck Depression Inventory. Bold means significant results (p ≤ 0.05).

		Beta	t-Value	p-Value	Partial r
Model 1	Adjust R2 = 0.37 (F6,43 = 5.70, p = 0.001)
	(Constant)		2.04	0.047
	Sex	0.15	1.25	0.219	0.19
	Age	−0.38	−2.71	0.010	−0.38
	Education	0.41	2.99	0.005	0.41
	BMI	0.10	0.78	0.437	0.12
	AHI	−0.02	−0.18	0.860	−0.03
	% Time SpO2 < 90%	−0.12	−0.95	0.346	−0.14
Model 2	Adjust R2 = 0.34 (F8,41 = 4.13, p = 0.001)
	(Constant)		1.83	0.074
	Sex	0.14	1.10	0.277	0.17
	Age	−0.38	−2.62	0.012	−0.38
	Education	0.41	2.90	0.006	0.41
	BMI	0.09	0.70	0.490	0.11
	AHI	−0.02	−0.13	0.896	−0.02
	% Time SpO2 < 90%	−0.12	−0.96	0.342	−0.15
	STAI-Y2	0.07	0.48	0.636	0.07
	BDI	−0.06	−0.38	0.705	−0.06
Model 3	Adjust R2 = 0.40 (F9,40 = 4.60, p = 0.001)
	(Constant)		2.62	0.012
	Sex	0.15	1.23	0.226	0.19
	Age	−0.46	−3.22	0.003	−0.45
	Education	0.28	1.92	0.062	0.29
	BMI	−0.03	−0.22	0.824	−0.04
	AHI	0.06	0.45	0.658	0.07
	% Time SpO2 < 90%	−0.12	−0.96	0.340	−0.15
	STAI-Y2	−0.03	−0.19	0.847	−0.03
	BDI	0.05	0.35	0.725	0.06
	Days of Adaptation	0.31	3.23	0.031	0.33