Variables HH Study N (%) N = 4,022 Composite Outcome N (%) N = 1,462 No Composite Outcome N (%) N = 2,560 P-value
Time elapsed from index pregnancy 3.2 ±0.9 3.2 ±0.9 3.2 ±0.9 0.042
Maternal Age >= 35 378 (9.4) 159 (10.9) 219 (8.6) 0.015
Race (Non-Hispanic Black) 495 (12.3) 212 (14.5) 283 (11.1) 0.001
Education (Some college or less) 1506 (37.4) 592 (40.5) 914 (35.7) 0.003
Gravidity >= 3 248 (6.2) 107 (7.3) 141 (5.5) 0.022
Smoking 625 (15.6) 282 (19.3) 343 (13.4) 0.001
Alcohol Use (ever) 2509 (62.4) 902 (61.7) 1607 (72.8) 0.498
Prior Miscarriage 599 (14.9) 232 (15.9) 367 (14.3) 0.189
Prior Abdominal Surgery 408 (10.1) 151 (10.3) 257 (10.0) 0.770
Prior Bleeding at First Trimester 272 (6.8) 106 (7.3) 166 (6.5) 0.354
≤ 200% of the federal poverty level 1013 (30.3) 410 (34.0) 603 (28.2) 0.000
Government Health Insurance 1066 (26.6) 428 (29.4) 638 (25.0) 0.002