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. Author manuscript; available in PMC: 2019 Mar 1.
Published in final edited form as: J Epidemiol Community Health. 2018 Jan 5;72(3):230–236. doi: 10.1136/jech-2017-209801

Table 3.

Characteristics of the Study Sample by Adverse Pregnancy Outcome Status (N=34,383 births Chicago IL, 2009-2013)1

Hypertensive Disease of
Pregnancy
Preterm Birth Small for Gestational Age
Yes No Yes No Yes No
N 1748 32635 2767 31484 3573 30554
Mother's Age at Delivery- Mean (SD) 31.0 (6.2) 31.1 (5.4) 30.7 (6.1) 31.1 (5.4) 30.3 (5.8) 31.2 (5.4)
Race
 White 776 (44.4) 16287 (49.9) 1120 (40.5) 15886 (50.5) 1370 (38.3) 15582 (51.0)
 Hispanic/Latino 318 (18.2) 5875 (18.0) 513 (18.5) 5647 (17.9) 606 (17.0) 5536 (18.1)
 Black/African American 343 (19.6) 3449 (10.6) 548 (19.8) 3228 (10.2) 615 (17.2) 3131 (10.2)
 Asian/Pacific Islander 66 (3.8) 2272 (7.0) 159 (5.8) 2170 (6.9) 362 (10.1) 1961 (6.4)
 Other Race 93 (5.3) 1507 (4.6) 148 (5.3) 1445 (4.6) 195 (5.5) 1394 (4.6)
 Unknown Race 152 (8.7) 3245 (9.9) 279 (10.1) 3108 (9.9) 425 (11.9) 2950 (9.7)
Insurance Status
 Private 1232 (70.5) 25112 (77.0) 1932 (69.8) 24312 (77.2) 2565 (71.8) 23593 (77.2)
 Public 509 (29.1) 7316 (22.4) 817 (29.5) 6976 (22.2) 987 (27.6) 6769 (22.2)
 None 7 (0.4) 207 (0.6) 18 (0.7) 196 (0.6) 21 (0.6) 192 (0.6)
Multiparous 516 (29.5) 11769 (36.1) 1011 (36.5) 11216 (35.6) 930 (26.0) 11251 (36.8)
History of Asthma 213 (12.2) 3023 (9.3) 330 (11.9) 2895 (9.2) 341 (9.5) 2872 (9.4)
History of Mental Health Condition 170 (9.7) 2588 (7.9) 272 (9.8) 2472 (7.9) 270 (7.6) 2463 (8.1)
History of Sexually Transmitted Disease 196 (11.2) 3728 (11.4) 349 (12.6) 3559 (11.3) 425 (11.9) 3468 (11.4)
History of Substance Abuse2 41 (2.4) 642 (2.0) 103 (3.8) 574 (1.8) 115 (3.2) 559 (1.8)
Prevalent Hypertension 147 (8.4) 261 (0.8) 112 (4.1) 292 (0.9) 55 (1.5) 347 (1.1)
Prevalent Diabetes 52 (3.0) 253 (0.8) 58 (2.1) 245 (0.8) 23 (0.6) 279 (0.9)
Gestational Diabetes3 180 (10.3) 1416 (4.3) 223 (8.1) 1364 (4.3) 158 (4.4) 1427 (4.7)
Infant Sex
 Male 876 (50.1) 16667 (51.1) 1518 (54.9) 15963 (50.7) 1815 (50.8) 15595 (51.0)
 Female 872 (49.9) 15968 (48.9) 1249 (45.1) 15521 (49.3) 1758 (49.2) 14959 (49.0)
Percent of census tract below poverty level- Mean (SD)4 19.3 (12.7) 17.2 (11.3) 19.5 (12.7) 17.1 (11.3) 18.5 (12.1) 17.2 (11.3)
1

Values are N (%) unless otherwise specified. All demographic/clinical data extracted from electronic medical records.

2

Including alcohol and tobacco use during current pregnancy

3

In current pregnancy

4

Based on the 2009-2013 American Community Survey.