Table 5. Univariate and multivariate logistic regression analysis of factors associated with pneumonia.

Variables		Univariate analysis OR (95% CI)	P value	Multivariate analysis OR (95% CI)	P value
Sex
	Female	Reference	Reference
	Male	2.200 (1.397–3.463)	0.007	2.719 (1.612–4.588)	< 0.001
Age, yr
	12–19	Reference	Reference	Reference	Reference
	20–29	3.281 (0.731–14.734)	0.121	5.278 (1.098–25.365)	0.038
	30–39	8.578 (1.968–37.387)	0.004	11.150 (2.388–52.0412)	0.002
	40–49	12.204 (2.892–51.506)	< 0.001	18.051 (3.977–81.924)	< 0.001
≥ 1 risk factor		2.784 (1.732–4.477)	< 0.001	1.868 (0.842–4.145)	< 0.001
Vaccinated status
	Complete primary vaccine series	Reference	Reference	Reference	Reference
	Incomplete primary vaccine series	0.892 (0.261–3.045)	0.855	1.138 (0.310–4.177)	0.846
	Not vaccinated	6.224 (3.858–10.042)	< 0.001	7.460 (4.378–12.714)	< 0.001

OR = odds ratio, CI = confidence interval.