Table 1a.

Participant characteristics by hospital and total number of participants, April 2021.

Participant characteristics		Hospital 1		Hospital 2		P-value*	Total
		(N = 2,945)		(N = 2,140)			(N = 5,085)
		n	%	n	%		n	%
Age groups	18–29	653	22	455	21	0.431	1,108	22
	30–39	765	26	565	26		1,330	26
	40–49	811	28	603	28		1,414	28
	50–59	565	19	386	18		951	19
	≥60	151	5.1	131	6.1		282	5.5
Sex	Female	2,278	77	1,681	79	0.309	3,959	78
	Male	667	23	459	21		1,126	22
Ethnicity	Irish (White)	2,091	71	1,707	80	<0.001	3,798	75
	Any other white background	257	8.7	219	10		476	9.4
	Asian background	470	16	129	6.0		599	12
	African/other black background	69	2.3	48	2.2		117	2.3
	Other	58	2.0	37	1.7		95	1.9
Country of birth	Ireland	2,025	69	1, 605	75	<0.001	3,630	71
	United Kingdom	134	4.6	161	7.5		295	5.8
	India	225	7.6	68	3.2		293	5.8
	Philippines	198	6.7	16	0.7		214	4.2
	Poland	26	0.9	59	2.8		85	1.7
	USA	21	0.7	34	1.6		55	1.1
	Other	316	11	197	9.2		513	10
Education	Primary	20	0.7	2	0.1	<0.001	22	0.4
	Secondary	409	14	200	9.3		609	12
	Third level	1,280	43	964	45		2,244	44
	Post-graduate	1,236	42	974	46		2,210	43
Role	Admin	403	14	273	13	<0.001	676	13
	Medical/dental	357	12	356	17		713	14
	Nursing/ midwifery	1,097	37	794	37		1,891	37
	Allied health	612	21	432	20		1,044	21
	General support	243	8.3	122	5.7		365	7.2
	Health care assistant	179	6.1	112	5.2		291	5.7
	Other	54	1.8	51	2.4		105	2.1
Lives with	Alone	270	9.2	194	9.1	0.603	464	9.1
	With others	2,667	90.6	1,943	90.8		4,610	90.7
	Missing	8	0.3	3	0.1		11	0.2
Lives with HCW	Yes	928	32	643	30	0.284	1,571	31
	No	1,964	67	1,448	68		3,412	67
	Missing	53	1.8	49	2.3		102	2.0

^*Calculated using the chi-square test. Statistically significant findings in bold.