Table 2.

Likelihood of Polymerase Chain Reaction (PCR)-confirmed Influenza by logistic regression among 4,173 enrollees ≥5 years of age

Variable	Logit Model
	Odds Ratio	95 % CI
Vaccinated by self-report	0.73	0.52–1.03
Smoker in the household	0.62	0.45–0.85
Symptoms reported at enrollment
Fever	5.33	4.01–7.10
Cough	7.32	4.14–12.9
Fatigue	2.32	1.58–3.41
Wheezing	0.99	0.81–1.21
Sore throat	0.84	0.69–1.03
Nasal congestion	1.06	0.84–1.35
Shortness of breath	0.86	0.71–1.05