Temporal Trends in Chorioamnionitis by Maternal Race/Ethnicity and Gestational Age (1995–2010)
Table 1
Distribution of maternal characteristics based on chorioamnionitis (CAM) status.
No CAM
CAM
Characteristics
(,393)
(,428)
%
%
Maternal age (years)*
<20
6.1
7.4
20–29
45.9
48.0
30–35
28.2
26.9
≥35
19.8
17.6
Race/ethnicity*
Non-Hispanic White
27.0
20.2
Non-Hispanic Black
10.4
8.7
Hispanics
51.6
53.1
Asian/Pacific Islanders
11.0
18.1
Maternal education (years)
<12
13.9
10.4
12
29.5
25.4
≥13
53.3
60.0
Missing
3.3
4.2
Household income*‡
<$30,000
6.0
6.2
$30,000–$49,999
27.7
28.2
$50,000–$69,999
29.5
30.0
$70,000–$89,999
19.6
19.3
≥$90,000
17.2
16.3
Late or no prenatal care*
14.8
13.0
Smoking during pregnancy
9.5
10.5
Parity*
0
38.5
72.0
1
33.2
18.1
2
18.1
6.5
≥3
10.3
3.4
Induction of labor*
24.0
39.8
*Differences between CAM and No-CAM by maternal characteristics were statistically significant (); ‡Median household income based on census tract information.
