Table 1.
Descriptive characteristics of the study population, patients with singleton live birth and history of infertility, 2006–2017 (N = 94,097)
| Infertile patients with delivery and no SMM* event N=91.916 |
Infertile patients with delivery and any SMM* event N=2.181 |
||
|---|---|---|---|
| Maternal Age (years) | Mean (SD) | 34.2 (4.8) | 35.2 (5.2) |
| Year of Delivery | % | ||
| 2007–2008 | 16.7 | 16.9 | |
| 2009–2011 | 26.7 | 27.7 | |
| 2012–2014 | 26.9 | 22.6 | |
| 2015–2017 | 29.7 | 32.9 | |
| Maternal Race | % | ||
| Asian | 12.5 | 8.5 | |
| Black | 7.8 | 12.7 | |
| Hispanic | 10.7 | 10.3 | |
| White | 69.0 | 68.6 | |
| Highest Education | % | ||
| High School Diploma or less | 15.0 | 17.4 | |
| < Bachelor Degree | 49.3 | 52.6 | |
| ≥ Bachelor Degree | 35.8 | 30.0 | |
| Maternal age ≥ 40 | 13.8 | 19.7 | |
| Preconception anemia | 8.7 | 12.8 | |
| Asthma | 6.4 | 8.9 | |
| Cardiac disease | 5.4 | 14.6 | |
| Chronic hypertension | 6.7 | 16.5 | |
| Chronic renal disease | 1.4 | 3.6 | |
| Connective tissue disease | 1.7 | 3.7 | |
| Diabetes mellitus | 4.6 | 7.8 | |
| Endometriosis | 6.2 | 7.8 | |
| Epilepsy | 0.5 | 1.0 | |
| Gastrointestinal disease | 10.7 | 16.1 | |
| Hematologic disorder | 1.7 | 4.9 | |
| Mental health disorder | 14.9 | 20.2 | |
| Polycystic ovarian syndrome | 12.9 | 12.5 | |
| Prior cesarean delivery | 5.8 | 9.5 | |
| Prior uterine surgery (non-cesarean) | 5.0 | 9.2 | |
| Pulmonary hypertension | 0.09 | 1.2 | |
| Substance abuse disorder | 2.0 | 3.4 | |
| Thyroid disease | 16.1 | 17.6 | |
| Uterine fibroids | 10.4 | 17.9 | |
SMM, severe maternal morbidity
*
Excluding cases with blood transfusion as the only SMM indicator