The Role of Daytime Sleepiness in Psychosocial Outcomes after Treatment for Obstructive Sleep Apnea

Table 5

Prediction of Functional Outcomes of Sleep Questionnaire subscales in participants with OSA treated with CPAP using stepwise regression.

Predictors	Activity level	Vigilance	Intimate relationships	General productivity	Social outcomes
Age
β	0.33
Δ𝑅^2	.12
t (df)	2.31 (25)
P	.030
ESS (post)
β	−0.032	−0.66
Δ𝑅^2	.09	.43
t (df)	−2.12 (25)	−4.52 (25)	−2.30 (23)
P	.044	.000	.031
PSQI (post)
β	−0.43			−0.40	−0.16
Δ𝑅^2	.28			.16	0.37
t (df)	−2.86 (25)			−2.28 (27)	−3.95 (27)
P	.009			.031	.001
Model 𝑅^2	.49	.43	.19	.43	.37
Adjusted 𝑅^2	.43	.41	.15	.41	.34
F (df)	8.13 (3, 25)	20.41 (1, 27)	5.29 (1, 23)	20.41 (1, 27)	15.61 (1, 27)
P	.001	.000	.031	.000	.001

Non-significant predictor variables including education, diagnostic respiratory disturbance index (RDI), diagnostic peripheral oxygen saturation (SpO₂), and post-treatment sleep-efficiency are not shown in the table.
ESS: Epworth sleepiness scale; PSQI: Pittsburg sleep quality index.