Table 1.

Baseline characteristics for both groups showing the median and interquartile ranges or proportion with 95% confidence intervals

	2003 period	2005 period	p value
Age (years)	4 (3−8)	4 (3–8)	0.2101
Respiratory rate	32 (26–40)	30 (24–40)	0.2619
Oxygen saturation	95 (94–97)	96 (94–98)	0.4055
Severity
Mild	40% (29–53)	53% (44–61)	0.1086
Moderate	49% (37–62)	43% (35–51)	0.463
Severe	10% (4–20)	4% (2–9)	0.1292