“When did you decide to receive the Covid-19 vaccine?” Survey in a high-volume vaccination center

Figures & data

Table 1. Perceptions of the efficacy and safety of vaccines in general and Covid-19 vaccines in particular on a 0–100 scale

				Vaccines in general				Covid-19 vaccines
				Efficacy Median [IQR]	p	Safety Median [IQR]	p	Efficacy Median [IQR]	p	Safety Median [IQR]	p
General				90 [80–95]		80 [70–90]		80 [70–90] (p < .001 vs vaccines in general)		80 [50–90] (p < .001 vs vaccines in general)
Gender	M	Age	<40	90 [80–98]	<.001	90 [75–95]	.008	80 [70–90]	.730	80 [65–90]	.216
			≥40	90 [80–95]		80 [70–90]		80 [70–90]		80 [60–90]
	F		<40	90 [80–95]	.004	80 [60–90]	.022	80 [60–90]	.556	70 [50–85]	.078
			≥40	80 [75–90]		80 [60–90]		80 [60–85]		70 [50–80]
At risk of severe Covid-19		Not at all/not really		90 [80–95]	.483	80 [70–90]	.149	80 [70–90]	.308	80 [55–90]	.125
		Other		90 [80–95]		80 [70–90]		80 [70–90]		75 [50–90]

Table 2. Answers to the questions regarding the timing of the decision to receive the vaccine, and the preference to have received the vaccine earlier

		General	Age				Gender				Being at risk of Covid-19
			<40	≥40	p	p (MV*) OR (95% CI)	M	F	p	p (MV*) OR	Not at all/not really	Other	p
When did you decide to receive the vaccine?	As soon as the pandemic began in early 2020	9.3%	62.4%	74.9%	<.001	<0.001 0.53 [0.44–0.63] (OR for those ≥40 for the answer “less than 1 month/week”)	69.2%	67.7%	.445	0.014 1.25 [1.05–1.47] (OR for women for the answer “less than 1 month/week”)	59.1%	79.0%	<.001
	As soon as the vaccines were announced in late 2020	21.1%
	Between 6 and 3 months ago	10.7%
	Between 3 and 1 months ago	27.4%
	Less than 1 month ago	15.5%	37.6%	25.1%			30.8%	32.3%			40.9%	21.0%
	Less than 1 week ago	16.0%
Would you have preferred to receive the vaccine earlier?	Not at all	23.2%	57.5%	57.3%	.984	0.052 1.17 [1.00–1.39] (OR for those ≥40 for the answer “rather/definitely yes”)	50.4%	65.8%	<.001	<0.001 0.51 [0.43–0.60] (OR for women for the answer “rather/definitely yes”)	62.4%	51.9%	<.001
	Not really	22.4%
	Neither yes nor no	11.9%
	Rather yes	14.8%	42.5%	42.6%			49.6%	34.2%			37.6%	48.1%
	Definitely yes	27.7%
Would you have preferred to receive the vaccine as early as January 2021?	Not at all	30.8%	66.7%	63.6%	.118	0.002 1.31 [1.10–1.55] (OR for those ≥40 for the answer “rather/definitely yes”)	59.9%	71.4%	<.001	<0.001 0.56 [0.47–0.67] (OR for women for the answer “rather/definitely yes”)	71.2%	58.4%	<.001
	Not really	24.1%
	Neither yes nor no	10.3%
	Rather yes	13.1%	33.3%	36.4%			40.1%	28.6%			28.8%	41.6%
	Definitely yes	21.7%

F: females, M: males. *multivariate analysis including gender and age </≥40.

Figure 1. Score attributed to Covid-19 vaccine efficacy and safety according to the answers to the questions “When did you decide to receive the vaccine?” “Would you have preferred to receive the vaccine earlier?” and “Would you have preferred to receive the vaccine as early as January 2020?”