Characteristic	N	% (95% CI)	Total
Sex
Male	154	33.4 (29.1 to 37.7)	461
Female	121	22.3 (18.9 to 25.8)	543
Age group
16-24	14	17.9 (9.4 to 26.4)	78
25-34	29	23.2 (15.8 to 30.6)	125
35-44	45	20.5 (15.2 to 25.8)	220
45-54	65	25.5 (20.2 to 30.8)	255
55-64	53	31.2 (24.3 to 38.1)	170
≥ 65	69	44.2 (36.4 to 52.0)	156
Occupation
Students	10	16.7 (7.3 to 26.1)	60
Unemployed	20	20.4 (12.4 to 28.4)	98
Working	152	24.4 (21.1 to 27.7)	623
Retired	93	42.1 (35.6 to 48.6)	221
Education
Low	92	25.4 (21.0 to 29.8)	362
Intermediate	46	23.1 (17.3 to 28.9)	199
High	137	31.0 (26.7 to 35.3)	442
Monthly Income
< €3,000	134	23.7 (20.2 to 27.2)	565
€3,000 - €4,500	59	28.6 (22.5 to 34.7)	206
> €4,500	82	32.2 (26.5 to 37.9)	255
Risk factors
Yes	62	36.8 (29.5 to 44.1)	168
No	213	25.7 (22.8 to 28.6)	829
Parental status
Yes	13	33.3 (18.5 to 48.1)	39
No	262	27.2 (24.5 to 29.9)	963
Working in health or child care
Yes	81	30.8 (25.3 to 36.3)	263
No	194	26.2 (23.1 to 29.3)	740
Previous influenza vaccine receipt
Yes	156	41.7 (36.8 to 46.7)	374
No	119	18.9 (15.9 to 21.9)	630
Total	275	27.4 ( 24.7 to 30.1)	1004