Table 4. Prenatal care of pregnant women with syphilis associated with the outcome of prematurity (Fortaleza, Ceará, 2015).

Variables		n (%)	Prematurity				p	Crude OR (95%CI)
			Yes		No
			n	%	n	%
Number of consultations							0.005
	≥ 6	209 (52.8)	18	8.6	191	91.4		1
	< 6	187 (47.2)	34	18.2	153	81.8		2.35 (1.28–4.33)
Onset of prenatal care							0.092
	First and second trimesters	354 (89.4)	43	12.1	311	87.9		1
	Third trimester	42 (10.6)	9	21.4	33	78.6		1.97 (0.88–4.40)
Number of tests for syphilis in prenatal care							0.008
	At least one	332 (83.8)	37	11.1	295	88.9		1
	None	64 (16.2)	15	23.4	49	76.6		2.44 (1.24–4.77)
Underwent two VDRL tests in prenatal care							0.112
	Yes	78 (19.7)	6	7.7	72	92.3		1
	Not/ignored	318 (80.3)	46	14.5	272	85.5		2.02 (0.83–4.93)
Treatment of the pregnant women in prenatal care							< 0.001
	With benzathine penicillin	180 (45.4)	11	6.1	169	93.9		1
	Other drug/Untreated	216 (54.6)	41	19.0	175	81.0		3.59 (1.79–7.23)