Table 4.

Logistic regression analysis of factors associated with acceptance of the booster dose of vaccination.

	Crude OR	95% CI	p-Value	Adjusted * OR	95% CI	p-Value	Eta **
Sex	0.81	0.71–0.91	0.001	0.95	0.81–1.10	0.483	0.07
Age	1.46	1.40–1.52	<0.001	1.39	1.31–1.47	<0.001
Child	1.73	1.53–1.95	<0.001	0.98	0.83–1.15	0.777
Annual household income	1.05	0.91–1.22	0.526	1.27	1.08–1.49	0.003
Underlying disease	1.94	1.69–2.22	<0.001	1.30	1.10–1.54	0.003
Social norms	3.98	3.66–4.34	<0.001	4.02	3.64–4.45	<0.001	0.27
Confidence	1.80	1.71–1.90	<0.001	1.76	1.65–1.87	<0.001	0.13
Complacency	2.34	2.20–2.49	<0.001	2.18	2.03–2.34	<0.001	0.18
Constraints	2.41	2.26–2.56	<0.001	2.27	2.11–2.45	<0.001	0.18
Calculation	1.12	1.07–1.17	<0.001	1.10	1.04–1.16	0.001	0.07
Collective responsibility	1.83	1.73–1.93	<0.001	1.77	1.65–1.90	<0.001	0.13
Compliance	1.25	1.19–1.31	<0.001	1.24	1.18–1.31	<0.001	0.08
Conspiracy	1.53	1.45–1.62	<0.001	1.42	1.33–1.52	<0.001	0.09

* Adjusted for sex, age, children, underlying disease status, household income, and adverse events of previous vaccination (fever, tiredness, fatigue, headache, cold, vomiting, diarrhea, muscular pain, arthralgia, and anaphylactic shock). However, sex, age, children, underlying disease status, and household income were adjusted all at once. ** The effect size (eta squared) was calculated using the General Linear Model, adjusted for age, children, underlying disease status, household income, and adverse events of previous vaccination (fever, washed-out feeling, headache, cold, vomiting, diarrhea, muscular pain, arthralgia, anaphylactic shock). OR: odds ratio; CI: confidence interval.