Table 2.

Linear regression Pearson correlation coefficient (r) values of brain specific tissue oxygen saturation (StO₂B), somatic StO₂ (StO₂S), specific tissue oxygen saturation (SpO₂), brain fractional tissue oxygen extraction (FTOE-B), somatic FTOE (FTOE-S), and CSOR compared to blood pressure (diastolic, mean, and systolic), heart rate, respiration rate, and subject age indices for all subject data combined using the 60-s binned data.

Pearson regression correlation coefficient (r)	StO2B	StO2S	SpO2	FTOE-B	FTOE-S	CSOR
ABP (diastolic)	0.285	0.175	0.277	−0.224	−0.116	0.044
ABP (mean)	0.266	0.159	0.259	−0.213	−0.113	0.049
ABP (systolic)	0.22	0.126	0.216	−0.183	−0.101	0.054
HR	−0.171	−0.148	−0.218	0.089	0.079	−0.058
RR	−0.02	0.056	0.048	0.041	−0.038	0.075
Age	−0.081	−0.199	−0.021	0.076	0.201	−0.166
Gestational age (GA) at birth	0.364	0.277	0.348	−0.285	−0.213	0.088
Total age (GA + age)	0.322	0.151	0.336	−0.238	−0.076	−0.018
Birth weight	0.348	0.285	0.336	−0.26	−0.204	0.098
Current weight	0.355	0.229	0.324	−0.27	−0.136	0.031

There were ~29,000–39,000 paired data points per comparison where all comparisons were statically significant (p < 0.0001).

All statistically significant (p < 0.0001).

ABP, arterial blood pressure.