Table 2.

Summary of parameters sourced for the model.

Parameter	Value	Source
Percentage of 65+ population vaccinated	54.7%	[17]
Life expectancy for 65+ population	9.8 years	[18]
65+ population size	9,371,743	[19]
aQIV tender price	EUR 13	[44]
aQIV list price	EUR 23	[45]
HD-QIV tender price	EUR 25	[44]
HD-QIV list price	EUR 32	[45]
Primary-care physician visits cost	EUR 59	[46,47,48]
Emergency department visit cost	EUR 183	[46,47,48]
Hospitalization cost	EUR 4467	[47,49]
Comedication cost	EUR 3.21	[50]
Probability of being employed (65–69 years old)	1.2%	[52]
Probability of being employed (75+ years old)	0.3%	[52]
Productivity loss per hour	EUR 17.44	[53]
Probability of requiring care at home (65–69 years old)	5.4%	[54]
Probability of requiring care at home (75+ years old)	14%	[54]
Baseline utility for 65+	0.65	[23]
Disutility value for symptomatic patients	0.32	[43]
Disutility value for outpatients	0.33	[42]
Disutility value for inpatients	0.6	[42]
Disutility duration for symptomatic patients	7 days	[43]
Disutility duration for outpatients	7 days	[42]
Disutility duration for inpatients	21 days	[42]
Hospital mortality rate for 65+ population	6%	[24]
Discount rates for costs and outcomes	3%	[16]