Influence of Sexually Transmitted Infections in Pregnant Adolescents on Preterm Birth and Chorioamnionitis
Table 1
Demographic and reproductive history characteristics and pregnancy outcomes for 739 study participants overall and by sexually transmitted infection status.
Characteristic
Overall
Any STI ()
No STI ()
value
Demographic
Age (median)
739
18
(17–19)
18
(17–19)
18
(17–19)
0.35
Age
739
0.66
13-15
36
(4.9)
5
(4.1)
31
(5.0)
16-17
190
(25.7)
35
(28.7)
155
(25.1)
18-19
513
(69.4)
82
(67.2)
431
(69.9)
Marital status
738
<0.01
Single
671
(90.9)
120
(98.4)
551
(89.5)
Married
60
(8.1)
2
(1.6)
58
(9.4)
Divorced/separated
7
(1.0)
0
(0)
7
(1.1)
Race
737
<0.001
White
411
(55.8)
44
(36.1)
367
(59.7)
Black
268
(36.4)
72
(59.0)
196
(31.9)
Other†
58
(7.9)
6
(4.9)
52
(8.5)
Smoking status
727
0.96
Never
409
(56.3)
67
(55.4)
342
(56.4)
Ever‡
115
(15.8)
19
(15.7)
96
(15.8)
Yes
203
(27.9)
35
(28.9)
158
(27.7)
Reproductive history
Gravidity
739
1
(1)
1
(1)
1
(1)
0.79
Parity
739
0
(0-1)
0
(0-1)
0
(0-1)
0.63
Pregnancy outcomes
Preeclampsia
739
45
(6.1)
6
(4.9)
39
(6.3)
0.55
Cesarean section
737
185
(25.1)
32
(26.2)
153
(24.9)
0.75
Gestational age at delivery
739
0.20
<34 weeks
74
(10.0)
17
(13.9)
57
(9.2)
34-36 weeks
65
(8.8)
7
(5.7)
58
(9.4)
37-38 weeks
178
(24.1)
33
(27.1)
145
(23.5)
≥39 weeks
422
(57.1)
65
(53.3)
357
(57.9)
Preterm birth
739
139
(18.8)
24
(19.7)
115
(18.6)
0.79
Any chorioamnionitis
738
112
(15.2)
24
(19.7)
88
(14.3)
0.13
Clinical chorioamnionitis
708
22
(3.1)
5
(4.4)
17
(2.9)
0.38
Chorioamnionitis by placental pathology
381
101
(26.5)
20
(33.3)
81
(25.2)
0.19
Results reported as (%) or median (interquartile range). †Including participants identifying as Asian, American Indian, American Native, multiracial, or others. ‡Including participants reporting quitting or no smoking during this pregnancy.
