TABLE 1.

Data Inputs for Model Variables

		95% Range
Description (units)	Mean			Source
		Lower Limit	Upper Limit
COSTS
Influenza Vaccine ($US)	15.00	-	-	[23]
Vaccine Administration ($US)	5.00	-	-	Estimate
Anti-Viral medication: Oseltamivir ($US)	99.32	77.32	121.32	[23]
Influenza Treatment:
Over the Counter Medications ($US)	15.61	10.30	20.91	[23]
Outpatient Visit ($US)	151.38	114.94	187.81	[24]
Productivity Loss for Outpatient Visit ($US)	64.08	54.00	74.16	[25]
Hospitalization ($US), 65-84 years old	4723	4382	5064	[26]
Hospitalization ($US), >85 years old	5146	5406	5886	[26]
Death in Hospital ($US)	5,000	-	-	[27]
Treatment of Vaccine Side Effects ($US)	0.76	0.68	3.82	[28]
DURATIONS
Influenza (days)	7	-	-	[27, 29, 30]
Clinic Visit (hours)	4	-	-	[27, 29, 30]
UTILITIES
One Year of Life for Older Adult (QALY)	0.84	-	-	[10]
Utility/Day
Influenza no Hospitalization (QALY)	0.65	0.49	0.81	[11, 31]
Influenza with Hospitalization (QALY)	0.50	0.38	0.63	[11, 31]
Vaccine Side Effects (QALY)	0.95	0.71	1.00	[11]
PROBABILITIES
Clinical Outcomes without Vaccination
Influenza throughout the Year	0.125	0.05	0.20	[14]
Clinic Visit Given Influenza	0.40	-	-	[14]
Hospitalization Given Influenza	0.04	0.01	0.07	[14]
Clinical Outcomes with Vaccination
Reduction in Hospitalization	0.565	0.45	0.68	[14]
Reduction in Mortality	0.21	0	0.42	[14]
Side Effects	0.05	-	-	[14]
Decrease in Attack Rate from Earlier Vaccination	0.00	0.00	0.25	[13, 14]