Table 2.

Odds ratio of patient characteristics in ever receiving an antiviral prescription among influenza-positive patients in ARIC study

Variables	OR	95% CI
Age
0–17	Ref
18–65	4.38	(1.02, 18.88)
Site
WRNMMC, MD	NA	NA
SAMHS, TX	Ref
NMCSD, CA	0.29	(0.10, 0.82)
NMCP, VA	0.02	(0.002, 0.21)
MAMC, WA	0.58	(0.14, 2.33)
Obesity (BMI>=30)
No	Ref
Yes	0.16	(0.04, 0.66)
Hospitalization
No	Ref
Yes	11.21	(1.14, 109.98)
Receipt of influenza vaccine* in the season of ILI onset
No	Ref
Yes	2.35	(0.78, 7.13)

NOTE. Ref. the reference group.

NA. Estimate in multivariate regression was not available due to very small number.

^*including monovalent pH1N1 influenza vaccine.