Table 4. Factors associated to syphilis screening among women who were attended on days with availability of tests in Kinshasa and Lusaka.

	Kinshasa		Lusaka
	Syphilis Screening		Syphilis Screening
	(N=2660)		(N=9148)
	n/N (%)	P - value	n/N (%)	P - value
Maternal Age
<20	494/534 (92.5%)	0.0506	712/1341 (53.1%)	0.87812
20–34	1645/1767 (93.1%)	ref	3557/6821 (52.1%)	ref
> or = 35	330/359 (91.9%)	0.9148	491/948 (51.8%)	0.7006
Education
Incomplete primary school or less	436/470 (92.8%)	0.5816	1019/2111 (48.3%)	0.8951
Completed primary school	1572/1694 (92.8%)	0.5481	2463/4536 (54.3%)	0.9793
Incomplete secondary school	461/496 (92.9%)	ref	1280/2464 (51.9%)	ref
Marital status
Married/partner	2119/2276 (93.1%)	ref	4249/8065 (52.7%)	ref
Single, widowed, or divorced	350/384 (91.1%)	0.0284	513/1052 (48.8%)	0.0414
Obstetric history
Previous pregnancies
0	550/598 (92.0%)	0.5956	1285/2401 (53.5%)	0.4174
1-3	1221/1311 (93.1%)	ref	2825/5415 (52.2%)	ref
≥ 4	697/751 (92.8%)	0.2673	650/1288 (50.5%)	0.845
Previous abortions/stillbirth
No	1698/1842 (92.1%)	0.001	4164/7935 (52.5%)	0.483
Yes	770/817 (94.2%)	ref	581/1125 (51.6%)	ref
Previous preterm birth
No	2393/2578(92.8%)	0.4849	4593/8786 (52.3%)	0.0647
Yes	76/82 (92.7%)	ref	152/272 (55.9%)	ref
Previous congenital anomalies
No	2453/2644 (92.7%)	*	4728/9031 (52.3%)	0.5627
Yes	16/16 (100%)	ref	13/24 (54.2%)	ref
Previous low birth weight
No	2357/2535 (92.9%)	0.2942	4566/8674 (52.6%)	0.7731
Yes	112/125 (89.6%)	ref	140/268 (52.2%)	ref
Previous Syphilis Infection
No	2467/2657 (92.8%)	ref	4677/8940 (52.3%)	ref
Yes	2/3 (66.7%)	0.2611	85/177 (48.0%)	0.2611
Current pregnancy
Gestational age at first visit
Less or equal 20 weeks	949/1023 (92.8%)	ref	2504/4732 (52.9%)	ref
More than 20 weeks	1453/1569 (92.6%)	0.2611	2126/4095 (51.9%)	0.7933

(*) not estimable