Table 5. Multivariate logistic regression analysis on related factors of higher knowledge among the elderly in Jinan.

Factors		B	P	OR	95.0% CI
Age (every 10-year reduction)		0.440	0.011	1.55	1.11-2.18
Gender
	Male			1
	Female	0.510	0.008	1.67	1.15-2.42
Ethnicity
	The minorities			1
	Han Chinese	0.822	0.047	2.28	1.01-5.11
Educational level (every 1-level increment)		0.198	0.014	1.22	1.04-1.43
Health insurance status
	No health insurance			1
	At least one	0.591	0.017	1.81	1.11-2.94
Participating in societies
	None			1
	Participating in at least one	0.413	0.039	1.51	1.02-2.24
Family history of chronic diseases
	No			1
	Yes	0.555	0.010	1.74	1.14-2.65
Frequency of gathering with friends/relatives (every 1-level increment)		0.408	<0.001	1.50	1.27-1.78
Medical facilities which they usually go to
	The others			1
	Provincial hospitals/hospitals affiliated with medical universities	1.173	0.001	3.23	1.66-6.28
	Municipal hospitals	0.840	0.044	2.32	1.02-5.24
	District hospitals	-0.243	0.619	0.78	0.30-2.05
	Community health center/station	0.779	0.028	2.18	1.09-4.37
Constant		-4.639	<0.001