Table 4.

Binary and multivariate analysis of over-reported condom use among mid-age female sex workers

	Binary analysis			Model 1d		Model 2e
	Yes (n/%)	CPRa	95 % CIb	APRc	95 % CI	APR	95 % CI
Prevalent syphilis
Negative	114/20.5	1		1
Positive	52/27.8	1.35f	1.02–1.80	1.60	1.17–2.21
Active syphilis
Negative	142/21.5	1				1
Positive	24/29.3	1.36	0.94–1.96			1.91	1.27–2.88
Age (years)	40.4 vs 40.0	1.01	0.99–1.34	1.01	0.98–1.04	1.01	0.98–1.04
Education
Primary or less	64/18.8	1		1		1
Middle school	85/24.8	1.32	0.99–1.76	1.3	0.97–1.73	1.27	0.93–1.75
High school or above	17/29.3	1.56	0.99–2.46	1.54	0.98–2.43	1.59	0.95–2.68
Marital status
Married	79/22.3	1		1		1
Unmarred	7/14.0	0.63	0.31–1.28	0.56	0.29–1.20	0.6	0.29–1.23
Divorced or widowed	80/23.7	1.07	0.81–1.40	1.03	0.78–1.36	1.02	0.75–1.38
Residency
Urban	39/19.9	1		1		1
Rural	127/23.3	1.17	0.85–1.61	1.19	0.86–1.65	1.26	0.87–1.74
HIV knowledge	7.9 vs. 7.6	1.04	0.98–1.11	1.03	0.97–1.10	1.07	0.99–1.15
Attitude to condom use	13.4 vs. 12.7	1.07	1.02–1.12	1.08	1.02–1.13	1.08	1.02–1.15
Had diagnosed STD
No	133/22.9	1		1		1
Yes	33/20.6	0.90	0.64–1.27	0.71	0.49–1.04	0.45	0.26–0.82
Duration of sex work (years)
	4.4 vs. 4.8	1.00	0.99–1.01	0.99	0.99–1.00	0.99	0.99–1.01
Study sites
Hefei	32/19.2	1		1		1
Nanning	47/21.4	1.11	0.75–1.67	1.14	0.73–1.80	0.91	0.58–1.44
Qingdao	87/24.5	1.28	0.89–1.84	1.49	0.97–2.30	1.36	0.84–2.20

^aCrude prevalence ratio

^b95 % confidence interval

^cAdjusted prevalence ratio

^dModel includes prevalent syphilis as predictor

^eModel includes active syphilis as predictor

^fBold indicates p < 0.05