|
Relative contribution of placental abruption to preterm birth in Black compared to White women (stratified analysis) |
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| Birth Outcome |
Black |
White |
P* |
|
|
|
||||
| n (%) |
n (%) |
n (%) |
||
|
|
||||
| Abruption and Term Births (≥ 35)† |
3,310 |
605 |
2,705 |
< 0.001 |
| Number of Term Births |
635,772 |
99,213 |
536,559 |
|
| Frequency of Abruption |
(0.52) |
(0.61) |
(0.50) |
|
| Abruption and Late PTB (32–34)† |
725 |
161 |
564 |
< 0.001 |
| Number of Late PTB |
16,292 |
5,128 |
11,164 |
|
| Frequency of Abruption |
(4.45) |
(3.14) |
(5.05) |
|
| Abruption and Very PTB (28–31)† |
550 |
168 |
382 |
0.015 |
| Number of Very PTB |
6,869 |
2,483 |
4,386 |
|
| Frequency of Abruption |
(8.01) |
(6.77) |
(8.71) |
|
| Abruption and Extreme PTB (20–27)† |
466 |
170 |
296 |
0.029 |
| Number of Extreme PTB |
3,929 |
1,658 |
2,271 |
|
| Frequency of Abruption |
(11.86) |
(10.25) |
(13.03) |
|
|
* The p value for chi-square test. † Binary variable restricted to subpopulations of term births, late PTB, very PTB, and extreme PTB, OR was calculated using binary logistic regression. | ||||
Shen et al. BMC Pregnancy and Childbirth 2008 8:43 doi:10.1186/1471-2393-8-43 |
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