TABLE 3.

Multivariable Logistic Regression Analysis of Appendicitis Diagnosis (n = 1010)

Characteristic	Odds ratio	P value	95% Confidence interval
			Lower bound	Upper bound
Sex
Male	Ref.
Female	0.60	0.067	0.35	1.04
Age group
≤5 yr	Ref.
>5 yr	11.71	<0.001	4.17	32.83
Hospitalization
No	Ref.
Yes, without intensive care	5.07	0.024	1.24	20.71
Yes, with intensive care	1.29	0.749	0.27	6.15
Pyrexia (≥38.0/≥100.4°C/°F)
No	Ref.
Yes	2.55	0.289	0.45	14.41
Upper respiratory tract infection
No	Ref.
Yes	0.13	0.019	0.02	0.71
Lower respiratory tract infection
No	Ref.
Yes	0.29	0.299	0.03	3.00
Headache
No	Ref.
Yes	0.15	0.177	0.01	2.36
Chest radiograph abnormalities (pneumonia and/or ARDS)
No	Ref.
Yes	2.13	0.323	0.48	9.53
Oxygen support, mechanical ventilation and/or CPAP
No	Ref.
Yes	0.98	0.974	0.27	3.59
Administration of systemic corticosteroids
No	Ref.
Yes	0.57	0.343	0.18	1.81
MIS-C diagnosis
No	Ref.
Yes	0.57	0.252	0.22	1.49

Covariates that predict the outcome perfectly (immunosuppressants/immunodeficiency/chemo and diarrhea/vomiting) were excluded from the model.

ARDS indicates acute respiratory distress syndrome; CPAP, continuous positive airway pressure.