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Table 2 Likelihood of Polymerase Chain Reaction (PCR)-confirmed Influenza by logistic regression among 4,173 enrollees ≥5 years of age

From: Classification and Regression Tree (CART) analysis to predict influenza in primary care patients

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