The Association between Postoperative Cognitive Dysfunction and Cerebral Oximetry during Geriatric Orthopedic Surgery: A Randomized Controlled Study

Table 5

Correlation between regional cerebral oxygen saturation (rScO2) variables and selected cognitive test variable elements for patients with postoperative cognitive dysfunction (POCD) at baseline and 3 months after surgery.

	Digit span test		Correct order		Reverse order		Symbol digit test		Trail making test A		Verbal fluency test		Word recognition memory tests
		value		value		value		value		value		value		value
Correlation analysis in baseline
Preoperative rScO2	-0.05	0.51	-0.02	0.45	-0.11	0.61	-0.02	0.52	0.02	0.61	0.01	0.52	0.02	0.25
Mean rScO2 during surgery	0.06	0.62	0.03	0.51	0.25	0.25	0.03	0.13	0.01	0.17	0.02	0.25	0.03	0.61
Time below preoperative rScO2 (min)	0.01	0.35	0.01	0.41	-0.02	0.15	0.02	0.36	0.02	0.25	0.03	0.36	-0.05	0.35
Time below a 10% decrease from preoperative rScO2 (min)	0.02	0.64	0.02	0.25	0.03	0.62	0.01	0.21	-0.01	0.36	0.02	0.33	0.02	0.36
Time below a 20% decrease from preoperative rScO2 (min)	0.01	0.81	0.03	0.32	0.05	0.25	0.02	0.36	0.02	0.18	-0.01	0.22	0.01	0.25
CDL preoperative ()	-0.03	0.26	-0.03	0.36	0.02	0.44	0.02	0.25	0.03	0.09	0.05	0.35	0.02	0.36
CDL10 ()	0.02	0.61	0.01	0.51	0.03	0.36	-0.05	0.26	0.06	0.18	0.01	0.12	0.05	0.36
CDL20 ()	0.03	0.36	0.02	0.25	-0.01	0.25	0.02	0.65	0.05	0.24	0.02	0.36	0.01	0.31
Minimum rScO2 value	-0.02	0.64	0.02	0.61	0.02	0.68	0.01	0.89	0.02	0.21	0.03	0.25	0.02	0.81
Maximum rScO2 value	0.05	0.25	0.03	0.32	0.02	0.25	0.03	0.91	-0.05	0.22	0.01	0.39	-0.05	0.64
Correlation analysis in 3 months
Preoperative rScO2	0.23	0.02	0.05	0.52	0.05	0.61	0.05	0.62	0.02	0.02	0.62	0.02	0.26	0.02
Mean rScO2 during surgery	0.21	0.61	0.61	0.01	-0.06	0.35	0.36	0.36	0.03	0.36	0.36	0.36	0.32	0.62
Time below preoperative rScO2 (min)	0.02	0.35	0.02	0.02	0.02	0.33	-0.25	0.35	0.01	0.36	0.02	0.35	0.12	0.36
Time below a 10% decrease from preoperative rScO2 (min)	0.03	0.61	0.36	0.23	0.01	0.36	0.61	0.25	0.03	0.15	0.03	0.36	0.36	0.15
Time below a 20% decrease from preoperative rScO2 (min)	0.01	0.81	-0.05	0.51	-0.06	0.15	0.36	0.36	-0.02	0.36	0.25	0.02	0.25	0.25
CDL preoperative ()	0.02	0.36	0.02	0.36	0.21	0.25	0.32	0.15	0.03	0.35	-0.03	0.36	-0.05	0.36
CDL10 ()	-0.36	0.35	0.31	0.15	0.02	0.48	0.25	0.58	0.05	0.25	0.36	0.25	0.03	0.25
CDL20 ()	0.21	0.25	0.05	0.52	0.36	0.36	0.25	0.25	0.61	0.36	0.25	0.32	0.02	0.15
Minimum rScO2 value	0.06	0.23	0.06	0.33	0.02	0.02	-0.25	0.61	0.25	0.25	0.36	0.02	0.32	0.02
Maximum rScO2 value	0.02	0.02	0.04	0.11	0.03	0.01	0.03	0.25	0.36	0.25	-0.03	0.01	0.22	0.03