Table 1.

Influenza vaccine in the past

Q1. Have you heard of the flu vaccine?
	Frequency (n)	Percent	Z-test
			Statistic	p-value
Yes	224	94.9	19.516	< 0.00001
No	12	5.1
Q2. If YES, how did you hear about the flu vaccine?
	Frequency (n)	Percent
From the attending physician	11	4.7
From the media, i.e. television, the Internet	68	28.8
From family, friends	16	6.8
From the family doctor	24	10.1
I have known for a long time that such a vaccine exists	114	48.3
Q3. Have you ever had a flu vaccine in the past?
	Frequency (n)	Percent	Z-test
			Statistic	p-value
Yes	72	30.5		< 0.00001
No	164	69.5
Q4. Are you regularly (once a year) vaccinated against the flu?
	Frequency (n)	Percent	Z-test
			Statistic	p-value
Yes	26	11.0		< 0.00001
No	210	89.0
Q5. If you get the flu vaccine regularly, for how many years?
	Frequency (n)	Percent	Percentage among people who are vaccinated regularly (n = 39)
< 5 years	18	7.6	46.2
5–10 years	10	4.2	25.6
> 10 years	11	4.7	28.2