Table 1.
Maternal characteristics (n, %) of 3 million births in the State of California (2007–2012) by autoimmune conditions*
| All births | Rheumatoid arthritis | System iclupus erythematosus | Psoriasis | Inflammatory bowel disease | |
|---|---|---|---|---|---|
| n=2,963,888 | n=3,129 | n=3,863 | n=1,255 | n=2,714 | |
| Sociodemographic characteristics | |||||
| Race/ethnicity | |||||
| non-Hispanic White | 773352 (26.1) | 1134 (36.2) | 1050 (27.2) | 543 (43.3) | 1703 (62.8) |
| Hispanic | 1445356 (48.8) | 1313 (42.0) | 1568 (40.6) | 353 (28.1) | 509 (18.8) |
| Black | 158802 (5.4) | 202 (6.5) | 388 (10.0) | 36 (2.9) | 135 (5.0) |
| Asian | 366732 (12.4) | 210 (6.7) | 469 (12.1) | 199 (15.9) | 145 (5.3) |
| Other | 219646 (7.4) | 270 (8.6) | 388 (10.0) | 124 (9.9) | 222 (8.2) |
| Maternal age | |||||
| <18 | 85717 (2.9) | 26 (0.8) | 36 (0.9) | 11 (0.9) | 9 (0.3) |
| 18–34 | 2351645 (79.4) | 2228 (71.2) | 2917 (75.5) | 934 (74.4) | 1998 (73.6) |
| >34 | 526415 (17.8) | 875 (28.0) | 910 (23.6) | 310 (24.7) | 707 (26.1) |
| Pre-pregnancy BMI (kg/m2) | |||||
| <25 | 1479287 (49.9) | 1513 (48.4) | 1888 (48.9) | 488 (38.9) | 1678 (61.8) |
| 25–30 | 728096 (24.6) | 788 (25.2) | 936 (24.2) | 320 (25.5) | 543 (20.0) |
| >30 | 556623 (18.8) | 655 (20.9) | 805 (20.8) | 369 (29.4) | 351 (12.9) |
| missing | 199882 (6.7) | 173 (5.5) | 234 (6.1) | 78 (6.2) | 142 (5.2) |
| Insurance provider | |||||
| Private | 1373539 (46.3) | 1837 (58.7) | 2019 (52.3) | 824 (65.7) | 2044 (75.3) |
| Public | 1475205 (49.8) | 1199 (38.3) | 1705 (44.1) | 403 (32.1) | 599 (22.1) |
| Other | 115144 (3.9) | 93 (3.0) | 139 (3.6) | 28 (2.2) | 71 (2.6) |
| Education ≤ 12th grade | 1466653 (49.5) | 1123 (35.9) | 1550 (40.1) | 455 (36.3) | 609 (22.4) |
| missing | 109457 (3.7) | 118 (3.8) | 150 (3.9) | 42 (3.3) | 121 (4.5) |
| Pregnancy smoking | 134682 (4.5) | 202 (6.5) | 280 (7.3) | 145 (11.6) | 167 (6.2) |
| Pregnancy complications | |||||
| Preeclampsia or hypertension | 212590 (7.2) | 448 (14.3) | 875 (22.7) | 175 (13.9) | 258 (9.5) |
| Gestational Diabetes | 274102 (9.3) | 392 (12.5) | 426 (11.0) | 213 (17.0) | 230 (8.5) |
| Infection in pregnancy | 234043 (7.9) | 475 (15.2) | 698 (18.1) | 178 (14.2) | 382 (14.1) |
| Adverse pregnancy outcomes | |||||
| Preterm birth | 211802 (7.2) | 447 (14.3) | 901 (23.3) | 135 (10.8) | 371 (13.7) |
| Cesarean delivery | 956710 (32.3) | 1317 (42.1) | 1823 (47.2) | 528 (42.1) | 1097 (40.4) |
| Small for gestational age | 252848 (8.5) | 376 (12.0) | 636 (16.5) | 98 (7.8) | 279 (10.3) |
*
369 women had ICD9 codes for more than one autoimmune condition