. 2016 Mar 28;16:287. doi: 10.1186/s12889-016-2966-4

Table 2.

Factors associated with the awareness status of syphilis knowledge in logistic regression analysis

	Number of participants	Awareness of syphilis knowledge		OR_u	(95 % CI)	OR_m	(95 % CI) ^a
	Number of participants	Frequency	%	OR_u	(95 % CI)	OR_m	(95 % CI) ^a
Population
Urban residents	665	435	65.4	1.00		1.00
Factory workers	679	380	56.0	0.67	(0.54–0.84)^***	1.08	(0.84–1.39)
College students	718	371	51.7	0.57	(0.46–0.70)^***	0.45	(0.32–0.64)^***
Pregnant women	683	451	66.0	1.03	(0.82–1.29)	0.99	(0.76–1.29)
FSWs	371	200	53.9	0.62	(0.48–0.80)^***	1.38	(1.02–1.88)^*
MSM	354	287	81.1	2.26	(1.66–3.09)^***	1.59	(1.13–2.24)^**
Age (years)
≤ 20	686	346	50.4	1.00		1.00
21–25	884	468	52.9	1.11	(0.91–1.35)	1.03	(0.82–1.30)
26–30	846	582	68.8	2.17	(1.76–2.67)^***	1.76	(1.33–2.33)^***
31–35	452	314	69.5	2.24	(1.74–2.87)^***	1.79	(1.31–2.45)^***
> 35	602	414	68.8	2.16	(1.72–2.72)^***	1.64	(1.20–2.25)^**
Gender
Male	1289	880	68.3	1.00		1.00
Female	2181	1244	57.0	0.62	(0.53–0.71)^***	0.64	(0.54–0.77)^***
Ethnicity
Han	3307	2022	61.1	1.00
Others	163	102	62.6	1.06	(0.77-1.47)
Education
Junior middle school or lower	1042	542	52.0	1.00		1.00
Senior middle school	939	613	65.3	1.73	(1.45–2.08)^***	1.67	(1.38-2.02)^***
College or above	1489	969	65.1	1.72	(1.46–2.02)^***	2.66	(2.07-3.42)^***
Hukou
Shenzhen	839	572	68.2	1.00
Other cities in Guangdong province	936	543	58.0	0.64	(0.53–0.78)^***	0.79	(0.64–0.97)^*
Other provinces in China	1645	970	59.0	0.67	(0.56–0.80)^***	0.67	(0.54–0.84)^***
Hong Kong, Macao, and Taiwan	50	39	78.0	1.65	(0.83–3.28)	1.10	(0.53–2.29)

CI Confidential interval, OR _u odds ratio in univariate analysis, OR _m odds ratio in multivariate logistic regression

*p < 0.05; **p < 0.01; ***p < 0.001

^aAll the variables with p < 0.05 in univariate analysis were selected stepwise via a forward method, to be entered into the multivariate logistic regression model