Table 4.

COVID-19 related predictors of uncertainty and unwillingness to receive a COVID-19 booster vaccine using a multivariable multinomial regression (weighted, N = 22,139).

	Uncertain			Unwilling
	RRR	95% CI		RRR	95% CI
Confidence in government to handle pandemic (ref high)
Low confidence in government to handle pandemic	1·19	0·81	1·75	0·87	0·53	1·44
Confidence in health system to handle pandemic (ref high)
Low confidence in health system to handle pandemic	1·32	0·90	1·94	0·85	0·54	1·34
Knowledge of COVID 19 (ref high)
Low knowledge of COVID-19	1·78	1·19	2·67	1·19	0·70	2·05
Compliance across strict restriction periods (ref high)
Consistently low compliance with COVID-19 guidelines	1·51	1·04	2·19	2·45	1·65	3·65
Have had COVID-19 (ref have not had COVID-19)
Have had COVID-19, suspected by self or doctor	1·38	0·89	2·15	1·24	0·76	2·03
Have had COVID-19, confirmed by test	1·11	0·66	1·88	1·06	0·59	1·91
Stressed in the past week about catching/becoming ill from COVID-19 (stressed)
Not stressed	1·80	1·19	2·72	1·91	1·19	3·07
Initial COVID-19 vaccine intention (ref willing)
Initially uncertain about accepting a COVID-19 vaccine	4·92	2·98	8·11	5·29	3·07	9·09
Initially unwilling to accept a COVID-19 vaccine	6·40	3·94	10·41	11·29	6·79	18·78

Note. ‘Very likely’ to accept a COVID-19 booster vaccine was the reference group in the multinomial regression model. Ethnic minority groups refers to Black, Asian and minority ethnicity· GCSE refers to General Certificate of Secondary Education. Data were weighted to the proportions of gender, age, ethnicity, country, and education obtained from the Office for National Statistics. Model includes all socio-demographic variables in Table 3.