Table I.
Patient characteristics by database
| Patient variable | UHS (n=87,465) | CSL (n=140,324) | CR (n=56,964) |
|---|---|---|---|
|
| |||
| Age | 28 ± 6 | 27 ± 6 | 28 ± 6 |
|
| |||
| Body mass index (kg/m 2 ) | 32 ± 6 | 26 ± 6 | 33 ± 7 |
|
| |||
| Race | |||
| Black | 10,218 (12%) | 33,466 (24%) | 115,845 (28%) |
| White | 45,620 (52%) | 79,934 (57%) | 22,840 (40%) |
| Hispanic | 21,074 (15%) | 15,401 (27%) | |
| Other* | 31,627 (36%) | 5,850 (4%) | 1878 (5%) |
|
| |||
| Anaemia | 5812 (7%) | 18,153 (13%) | 4,751 (8%) |
|
| |||
| Parity | |||
| 0 | 13,657 (17%) | 60,072 (43%) | 15,927 (28%) |
| 1 | 42,768 (52%) | 39,017 (28%) | 21,863 (39%) |
| 2 | 12,171 (15%) | 22,473 (16%) | 11,637 (21%) |
| 3 or more | 13,201 (16%) | 18,762 (13%) | 7,214 (13%) |
|
| |||
| Smoking while pregnant | 11,985 (14%) | 9016 (6%) | 7723 (14%) |
|
| |||
| Insurance | |||
| Private | 35,840 (41%) | 89,840 (64%) | 24,814 (44%) |
| Public | 23,663 (27%) | 47,186 (34%) | 21,455 (38%) |
| Self | 2,241 (3%) | 1,808 (1%) | 10,680 (19%) |
| Other / Unknown | 25,621 (29%) | 1,490 (1%) | 0 |
|
| |||
| Delivery mode | |||
| Vaginal | 55,677 (64%) | 90,887 (65%) | 0 |
| Vaginal assisted | 7,561 (5%) | 0 | |
| CS† | 21,197 (36%) | 23,807 (17%) | 23,315 (41%) |
| Repeat CS | 14,383 (10%) | 28,854 (51%) | |
| VBAC‡ | 591 (1%) | 3,686 (3%) | (failed) 4,795 (8%) |
|
| |||
| Transfusion | 346 (0.4%) | 5,506 (3.9%) | 1,488 (2.6%) |
Data are mean ± standard deviation or n (%).
*
The category "Other" includes individuals who identified as neither Black nor White.
†
CS: Caesarean section.
‡
VBAC: Vaginal birth after caesarean section.