Table 1.

Influenza vaccination coverage of health-care workers in 2020/2021 influenza season.

Characteristics	Category	n (%) or mean ± SD	vaccinated n (%) or mean ± SD	p (chi-square test or t test)	OR (95% CI)
Total number of subjects	-	2192	868 (39.60)	-	-
Sex	Male	440 (20.07)	143 (32.50)	0.001	Ref.
	Female	1752 (79.93)	725 (41.38)		0.888 (0.681–1.157)
Education	Junior high school and below	6 (0.27)	1 (16.67)	0.000	Ref.
	High school	110 (5.02)	59 (53.64)		0.161 (0.017–1.495)
	Junior college	809 (36.91)	363 (44.87)		0.203 (0.022–1.844)
	University degree	1223 (55.79)	436 (35.65)		0.243 (0.027–2.219)
	Master degree and above	44 (2.01)	9 (20.45)		0.443 (0.042–4.643)
Occupation	Physicians	953 (43.5)	306 (32.11)	0.000	Ref.
	Nurses	1239 (56.5)	562 (45.36)		0.833 (0.654–1.060)
Field of work	Vaccination	460 (21.0)	237 (51.52)	0.000	Ref.
	Infectious disease Department	259 (11.8)	131 (50.58)		0.915 (0.663–1.261)
	Internal medicine	695 (31.7)	253 (36.40)		1.494 (1.146–1.948)
	Pediatrics	420 (19.2)	104 (24.76)		2.091 (1.476–2.962)
	Surgery	358 (16.3)	143 (39.94)		1.373 (1.014–1.859)
Professional title	Senior	72 (3.28)	27 (37.5)	0.143	Ref.
	Vice-senior	250 (11.41)	86 (34.4)		1.000 (0.552–1.815)
	Middle	444 (20.26)	176 (39.64)		0.698 (0.375–1.300)
	Primary	914 (41.7)	355 (38.84)		0.727 (0.372–1.419)
	No title	512 (23.36)	224 (43.75)		0.725 (0.356–1.477)
Monthly average income	≤3000	645 (29.43)	295 (45.74)	0.000	Ref.
	3001–5000	1116 (50.91)	424 (37.99)		1.162 (0.914–1.477)
	5001–8000	328 (14.96)	102 (31.1)		1.287 (0.886–1.869)
	8001–1000	69 (3.15)	32 (46.38)		0.693 (0.384–1.250)
	≥10,001	34 (1.55)	15 (44.12)		0.601 (0.269–1.344)
Know the effect of influenza vaccine	Yes	1815 (82.80)	760 (41.87)	0.000	0.624 (0.486–0.802)
	No	377 (17.20)	108 (28.63)		Ref.
Age, y	-	35.60 ± 9.146	35.90 ± 9.105	0.209	0.985 (0.955–1.015)
Length of service, y	-	11.12 ± 9.420	12.58 ± 9.474	0.069	0.996 (0.968–1.026)