Table 1.
Baseline characteristics of the study population
| Characteristic | Low-dose aspirin, n=179 |
No aspirin, n=183 |
Screen and treat, n=184 |
| Age (years) | 33 (19–44) | 34 (18–43) | 33 (19–44) |
| Race, n (%) | |||
| White | 181 (97.9) | 179 (95.7) | 180 (97.3) |
| Black | 1 (0.5) | 2 (1.1) | 0 (0) |
| Asian | 3 (1.6) | 6 (3.2) | 5 (2.7) |
| Other | 0 | 0 (0) | 0 (0) |
| Completed secondary school, n (%) | 136 (73.5) | 143 (76.4) | 152 (82.2) |
| BMI (kg/m2) | 25.2 (17.4–39.4) | 22.9 (17.7–41.4) | 23.8 (18.1–45.2) |
| Gestational age (weeks) | 12.9 (11.1–13.9) | 12.9 (11.1–13.9) | 12.9 (11.3–13.9) |
| Smoking, n (%) | 17 (9.2) | 11 (5.9) | 7 (3.8) |
| Subject’s mother had pre-eclampsia, n (%) | 7 (3.8) | 10 (5.4) | 10 (5.4) |
| Conception, n (%) | |||
| IVF | 5 (2.7) | 9 (4.8) | 8 (4.3) |
| ICSI | 3 (1.6) | 4 (2.1) | 3 (1.6) |
| Ovulation induction | 5 (2.7) | 6 (3.2) | 6 (3.2) |
| Spontaneous | 172 (93.0) | 168 (89.9) | 170 (91.9) |
| Previous miscarriage, n (%) | 20 (10.8) | 31 (16.6) | 31 (16.8) |
Where n (%) is not expressed, average and range are demonstrated.
BMI, body mass index, ICSI, intracytoplasmic sperm injection; IVF, in vitro fertilisation.