Table 5.

Incidence rate ratios (95% confidence intervals) for covid-19 vaccination or SARS-CoV-2 infection and occurrence of Bell’s palsy using self-controlled case series analysis in UK’s Clinical Practice Research Datalink AURUM database

	ChAdOx1 nCoV-19 first dose			BNT162b2 first dose			SARS-CoV-2 infection
	No of events	Incidence rate ratio (95% CI)		No of events	Incidence rate ratio (95% CI)		No of events	Incidence rate ratio (95% CI)
Baseline	7403	Ref		4564	Ref		2335	Ref
Days pre-vaccination/pre-infection:
−21 to −1	83	0.68 (0.54 to 0.84)		41	0.74 (0.54 to 1.00)		14	1.03 (0.58 to 1.68)
Day 0	5	0.83 (0.30 to 1.79)		<5			<5
Days post-vaccination/post-infection:
1-7	25	0.59 (0.38 to 0.85)		14	0.75 (0.42 to 1.22)		6	1.30 (0.52 to 2.65)
8-14	34	0.81 (0.56 to 1.11)		17	0.91 (0.54 to 1.41)		<5
15-21	43	1.03 (0.75 to 1.37)		16	0.84 (0.49 to 1.33)		7	1.51 (0.64 to 2.93)
1-21	102	0.81 (0.66 to 0.98)		47	0.83 (0.61 to 1.10)		*	0.94 (0.51 to 1.55)
1-90							48	0.76 (0.56 to 1.01)

Events with fewer than five occurrences have been omitted for privacy reasons.

^*Since event number <5 was blinded, the total number of events during the period was also blinded.