Table II.

In-hospital Mortality, Health Care Use, and Hospital Charges for Childhood Asthma Hospitalizations; 2000-2009

	2000 (N = 152 149)	2003 (N = 165 755)	2006 (N = 137 729)	2009 (N = 137 172)	P for Trend
Primary outcomes
In-hospital death, weighted No.	84	22	36	33
In-hospital mortality, % (95% CI)	0.06 (0.03-0.10)	0.01 (0.01-0.02)	0.03 (0.02-0.04)	0.02 (0.02-0.04)	.009
Mechanical ventilation
Weighted No.	1211	1235	988	1397
% (95% CI)	0.80 (0.67-0.94)	0.75 (0.65-0.85)	0.72 (0.62-0.83)	1.02 (0.89-1.17)	<.001
Hospital charges
Total Charge (95% CI) (billions)	1.27 (1.19-1.34)	1.59 (1.50-1.68)	1.40 (1.32-1.48)	1.59 (1.49-1.70)
Charges per discharge Geometric mean (95% CI)	5938 (5673-6203)	6879 (6583-7174)	7448 (7102-7793)	8406 (7941-8870)	<.001
Median (IQR)	5640 (3572-9339)	6537 (4099-10 827)	7130 (4529-11 763)	8109 (5089-13 436)
Secondary outcomes
Total inpatient days (95% CI), d (thousands)	364 (356-371)	390 (384-398)	310 (304-315)	305 (299-310)
Length of stay Geometric mean (95% CI), d	2.0 (2.0-2.0)	2.0 (1.9-2.0)	1.9 (1.9-1.9)	1.9 (1.8-1.9)	<.001
Median (IQR), d	1.5 (1.0-2.5)	1.5 (1.0-2.4)	1.4 (1.0-2.3)	1.4 (1.0-2.2)

CI, confidence interval; IQR, interquartile range

All charges are expressed as 2009 US dollars.