Co-administration of SARS-CoV-2 and influenza vaccines in healthcare workers: Results of two vaccination campaigns in a large teaching hospital in Rome

Figures & data

Table 1. Sociodemographic characteristics of the sample analyzed.

Variable	N	N (%)
Age class
23–31	2,074	28.03
32–41	1,654	22.35
42–52	1,853	25.04
53–84	1,818	24.57
Sex
F	4,477	60.51
M	2,922	39.49
Professional category
Physicians	1,432	19.35
Resident doctors	1,486	20.08
Nurses	2,147	29.02
Other HCWs **	1,243	16.80
Administrative staff	1,091	14.75
Tot	7,399	100.00

**The category “Other HCWs” includes midwives, healthcare assistants, pharmacists, psychologists, laboratory technicians, radiology technicians, physiotherapists, speech therapists, perfusionists, neurophysiopathology technicians, biologists, environmental and occupational prevention technicians, dieticians, orthoptists, audiometrists, occupational therapists and neuro- and psychomotricity therapists for children and adolescents.

Table 2. Anti-SARS-CoV-2 and influenza vaccine uptake either singularly or in co-administration in 2021/2022 and 2022/2023 campaigns by professional category.

	2021/2022		2022/2023
	N	N (%)	N	N (%)	Percent change (%)	p-value
Professional category
Physicians	1,227	85.68	470	32.82	−61.69	<.001*
Resident doctors	877	59.02	234	15.75	−73.31	<.001*
Nurses	1,741	81.09	206	9.59	−88.17	<.001*
Other HCWs	1,025	82.46	104	8.37	−89.84	<.001*
Administrative staff	837	76.72	161	14.76	−80.76	<.001*
Tot	5,707	77.13	1,175	15.88	−79.41	<.001*
Professional category
Physicians	623	43.51	533	37.22	−14.45	<.001*
Resident doctors	414	27.86	260	17.50	−37.19	<.001*
Nurses	489	22.78	299	13.93	−38.85	<.001*
Other HCWs	282	22.69	161	12.95	−42.93	<.001*
Administrative staff	259	23.74	234	21.45	−9.64	.0823
Tot	2,067	27.94	1,487	20.10	−28.06	<.001*
Professional category
Physicians	190	15.03	352	58.86	291.61	<.001*
Resident doctors	186	19.77	195	67.24	240.11	<.001*
Nurses	199	11.32	146	43.45	283.83	<.001*
Other HCWs	134	12.90	64	34.04	163.88	<.001*
Administrative staff	86	10.07	109	39.93	296.52	<.001*
Tot	795	13.58	866	51.39	278.42	<.001*

*Statistically significant value.

Table 3. Total co-administration of anti-SARS-CoV-2 and influenza vaccines in 2021/2022 and 2022/2023 campaigns by age category.

	2021/2022		2022/2023
Professional category	N	N (%)	N	N (%)	Percent change (%)	p-value
23–31	263	17.57	209	64.91	269.44	<.001*
32–41	182	13.97	164	52.23	273.87	<.001*
42–52	159	10.43	204	47.44	354.84	<.001*
53–84	191	12.47	289	46.69	274.42	<.001*
Tot	795	13.58	866	51.39	278.42	<.001*

*Statistically significant value.

Table 4. Results of the multivariable logistic regression in form of odds ratio with 95% confidence intervals.

Variables	Odds ratio	95% CI	p-value
Age category
23–31	1	[1; 1]
32–41	0.83	[0.52; 1.32]	.427
42–52	0.79	[0.49; 1.27]	.328
53–84	0.67	[0.42; 1.07]	.091
Sex
F	1	[1; 1]
M	1.53	[1.23; 1.90]	<.001*
Professional category
Physicians	1	[1; 1]
Resident doctors	1.12	[0.69; 1.84]	.639
Nurses	0.65	[0.48; 0.87]	.004*
Other HCWs	0.37	[0.26; 0.53]	<.001*
Administrative staff	0.49	[0.37; 0.67]	<.001*
Co-administration in 2021/2022
No	1	[1; 1]
Yes	1.63	[1.24; 2.16]	.001*

*Statistically significant value.

Data availability statement

The data are available upon request. All requests were addressed by the corresponding author.