. Author manuscript; available in PMC: 2012 May 1.

Published in final edited form as: J Pediatr. 2010 Dec 10;158(5):752–758.e1. doi: 10.1016/j.jpeds.2010.10.019

Table 2.

Measures of Cumulative Exposure to Hypocarbia

Quartiles of Cumulative Exposure to PaCO2<35mmHg		Cumulative Hypocarbia Range (mmHg.hrs)	Cumulative Hypocarbia Mean ± SD (mmHg.hrs)	Hours of Hypocarbia Mean ± SD (hrs)
> 75th quartile	45	≥ 116	165.3 ± 39.0	14.7 ± 3.4
50-75th quartile	45	59 - 115	88.7 ± 17.2	10.8 ± 3.7
25-50th quartile	45	29 - 58	42.9 ± 8.2	8.3 ± 3.1
≤ 25th quartile	46	1 - 28	12.2 ± 8.1	3.5 ± 2.4
No Exposure	23	-	-	-