Table 2.

Proportion of participants endorsing “Yes” and “No” for Dichotomous and Trichotomous Option Sets.

Vaccine of interest	Dichotomous option set		Trichotomous option set with "unsure"
	Yes	No	Yes	No
COVID-19 vaccine	0.37	0.63	0.28	0.47
COVID-19 booster	0.84	0.16	0.51	0.08
Influenza vaccine	0.74	0.26	0.53	0.25