Table 4.

Odds Ratios of Secondary Outcomes for Influenza Patients who Present Without Fever After Adjustment for Age (<65 Years or ≥65 Years), Sex, Charlson Comorbidity Index Score, Risk Factors for Influenza Complications, Immunosuppression, and Duration of Illness (<3 Days or ≥3 Days)

Outcomes	aOR (95% CI)	P Value
Diagnostic testing in EDa	0.51 (0.34–0.76)	<.001
Oseltamivir treatment	0.51 (0.34–0.75)	<.001
Intensive care unit stayb	1.13 (0.59–2.16)	.709
30-d re-presentation	0.97 (0.51–1.84)	.927
In-hospital mortality	6.36 (1.22–33.2)	.028

An OR <1 indicates less likely to have a specified outcome. Full models are included in Supplementary Tables 1–5.

Abbreviations: aOR, adjusted odds ratio; ED, emergency department; ICU, intensive care unit; PCR, polymerase chain reaction.

^aRespiratory PCR testing performed before patient transfer from emergency department to inpatient ward.

^bRequirement for ICU support at any time during hospital admission.