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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

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

Patient group (n = 28) ESS Min SO2 (%) Time SO2 < 90 (%)
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
  1. r Spearman’s Correlation coefficient, WCST Wisconsin Card Sorting Test
  2. * p < 0.05