European Radiology Experimental

Table 1 Baseline characteristics and end-tidal CO₂ values

From: Arterial CO₂ pressure changes during hypercapnia are associated with changes in brain parenchymal volume

Subject	Age	Sex	NC EtCO₂ (mmHg)	HC EtCO₂ (mmHg)	ΔEtCO₂ (mmHg)	NC EtO₂ (mmHg)	HC EtO₂ (mmHg)	ΔEtO₂ (mmHg)
1	64	M	36	49	13	113	113	0
2	34	M	32	39	7	111	118	8
3	25	F	33	39	6	111	113	2
4	24	F	36	45	10	107	108	1
5	25	F	37	44	7	107	117	10
6	34	M	28	38	10	119	116	-3
7	32	M	34	42	9	97	109	12
Median			34	42	9^*	111	113	2^**
IQR			33	39, 44	7, 10	107, 112	111, 117	0, 9

Values are rounded to the nearest integer. Changes are calculated from unrounded data
EtCO₂ End-tidal CO_2,EtO₂ End-tidal O₂, NC Normoxic normocapnia, HC Normoxic hypercapnia
^*p = 0.016, ^**p = 0.156

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