Time elapsed from index pregnancy |
3.2 ±.9 |
3.0±0.8 |
3.2±0.9 |
<0.001 |
Maternal Age >= 35 |
395 (9.6) |
76 (12.0) |
319 (9.2) |
0.027 |
Race (Non-Hispanic Black) |
525 (12.7) |
94 (14.8) |
431 (12.4) |
0.092 |
Education (Some college or less) |
1558 (37.8) |
272 (42.8) |
1286
(36.9) |
0.005 |
Gravidity >= 3 |
258 (6.3) |
39 (6.1) |
219 (6.3) |
0.887 |
Smoking |
654 (15.9) |
133 (20.9) |
521 (15.0) |
0.000 |
Alcohol Use (ever) |
2572 (62.4) |
397 (72.4) |
2175 (62.4) |
0.082 |
Prior Miscarriage |
621 (15.1) |
108 (17.0) |
513 (14.7) |
0.141 |
Prior Abdominal Surgery |
412 (10.0) |
67 (10.5) |
345 (9.9) |
0.62 |
Prior Bleeding at First Trimester |
284 (6.9) |
51 (8.0) |
233 (6.7) |
0.222 |
≤ 200% of federal poverty level |
1042 (30.5) |
186 (36.7) |
856 (29.4) |
0.001 |
Government Health Insurance |
1109 (27.0) |
213 (33.5) |
896 (25.8) |
<0.001 |
Chronic Hypertension |
101 (2.5) |
36 (6.7) |
65 (1.9) |
<0.001 |