Cerebral perfusion pressure and risk of brain hypoxia in severe head injury: a prospective observational study

Table 2 Correlation between tissue oxygen pressure and cerebral perfusion pressure below different cerebral perfusion pressure thresholds

		CPP < 50 mmHg	CPP < 60 mmHg	CPP < 70 mmHg	CPP < 80 mmHg	CPP < 90 mmHg	CPP < 100 mmHg	CPP < 130 mmHg
PtiO₂	Spearman's Rho coefficient^a	0.54	0.50	0.19	0.24	0.24	0.24	0.29
	Probability	< 0.05	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01
	N samples	16	75	308	776	1,252	1,510	1,672

^aBilateral correlation. CPP, cerebral perfusion pressure; PtiO₂, tissue oxygen pressure.

ISSN: 1364-8535