TABLE 2.

Comparisons of outcomes 1 week after croup diagnosis (after propensity matching).

Outcomes	COVID‐19	Non‐COVID‐19	RR (95% CI)	P value	Omicron	Non‐omicron	RR (95% CI)	P value
Admission	5.7%	2.7%	2.1 (1.58–2.95)	<0.001	5.7%	5.6%	1.02 (0.74–1.42)	0.897
ICU admission	4.3%	0.9%	4.9 (3.11–7.13)	<0.001	3.5%	5.1%	0.69 (0.47–0.99)	0.044
RR ≥ 60	1.7%	0.8%	2.0 (1.19–3.37)	0.008	1.0%	2.4%	0.42 (0.22–0.80)	0.006
Oxygen sat ≤ 90%	1.5%	0.7%	2.1 (1.21–3.70)	0.007	1.1%	1.6%	0.72 (0.37–1.38)	0.315

Abbreviations: CI, confidence interval; RR, risk ratio