Factors affecting executive functions in obstructive sleep apnea syndrome and volumetric changes in the prefrontal cortex

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Table 6 Epworth Sleepiness Scale scores, Min SO₂ and time SO₂ < 90% values by Wisconsin Card Sorting Test and Stroop Test in the patient group

Patient group (n = 28)	ESS		Min SO₂ (%)		Time SO₂ < 90 (%)
Patient group (n = 28)	r	p	R	p	r	p
WCST-2	0.370	0.053	0.232	0.234	0.072	0.715
WCST-4	0.452	0.016*	0.213	0.277	0.070	0.722
WCST-6	0.126	0.522	0.044	0.823	0.024	0.904
WCST-10	0.437	0.020*	0.102	0.606	0.077	0.697
Stroop test 1–5 difference	0.087	0.660	0.052	0.793	−0.026	0.895
Stroop test-5	0.014	0.944	−0.034	0.862	0.005	0.978
Stroop test-5 error	0.223	0.254	0.002	0.991	0.137	0.488
Stroop test-5 correction	−0.193	0.325	−0.165	0.402	0.079	0.691