Table 3.

Binary logistic regression analysis for variables and knowledge level (n = 2176)

Variables		β	SE	Wald	p	OR	95% CI
Gender	Male	Reference group
	Female	0.085	0.154	0.306	0.580	1.089	0.805 ~ 1.473
Age	≤39	Reference group
	40–49	−1.014	0.223	20.748	0.000	0.363	0.234 ~ 0.561
	≥50	−0.978	0.209	21.874	0.000	0.376	0.250 ~ 0.566
Marital status	Unmarried	Reference group
	Married	−1.297	0.421	9.471	0.002	0.273	0.120 ~ 0.624
	Divorce	−1.399	0.628	4.970	0.026	0.247	0.072 ~ 0.844
	Widowed	−1.537	0.740	4.312	0.038	0.215	0.050 ~ 0.917
Education	Junior middle school or below	Reference group
	Senior middle school	0.404	0.171	5.589	0.018	1.498	1.072 ~ 2.094
	Associate’s degree or above	1.441	0.215	44.721	0.000	4.224	2.769 ~ 6.443
Region	Southern Anhui	Reference group
	Central Anhui	−0.577	0.211	7.451	0.006	0.561	0.371 ~ 0.850
	Northern Anhui	−0.117	0.210	0.310	0.578	0.890	0.590 ~ 1.342
Residence	Rural	Reference group
	Urban	0.636	0.188	11.477	0.001	1.888	1.307 ~ 2.727
	Suburbs	0.405	0.206	3.852	0.050	1.500	1.001 ~ 2.247
Have you heard of COVID-19 vaccine before this survey?	No	Reference group
	Yes	1.260	0.372	11.472	0.001	3.525	1.700 ~ 7.308
Did you know the vaccine was effective in preventing COVID-19 before this survey?	No	Reference group
	Yes	0.661	0.311	4.512	0.034	1.937	1.052 ~ 3.564