Table 2.
Adverse birth outcomes by second and third trimester estimated fetal weight screening results (N = 7670)a
| Preterm birth | Small size for gestational age at birth | Large size for gestational age at birth | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Yes | No | Total | Yes | No | Total | Yes | No | Total | |
| 2nd trimester | |||||||||
| Estimated fetal weight < 10th percentile (screen-positive) | 41 (5.3%) | 726 (94.7%) | 767 | 192 (25.0%) | 575 (75.0%) | 767 | 30 (3.9%) | 737 (96.1%) | 767 |
| Estimated fetal weight 10–90th percentile (screen negative) | 254 (4.1%) | 5882 (95.9%) | 6136 | 554 (9.0%) | 5582 (91.0%) | 6136 | 588 (9.6%) | 5548 (90.4%) | 6136 |
| Estimated fetal weight > 90th percentile (screen-positive) | 50 (6.5%) | 717 (93.5) | 767 | 22 (2.9%) | 745 (97.1%) | 767 | 149 (19.4%) | 618 (80.6%) | 767 |
| Total | 345 | 7325 | 7670 | 768 | 6902 | 7670 | 767 | 6903 | 7670 |
| 3rd trimester | Yes | No | Total | Yes | No | Total | Yes | No | Total |
| Estimated fetal weight < 10th percentile (screen-positive) | 75 (9.8%) | 692 (90.2%) | 767 | 331 (43.2%) | 436 (58%) | 767 | 4 (0.5%) | 763 (99.5%) | 767 |
| Estimated fetal weight 10–90th percentile (screen negative) | 235 (3.8%) | 5901 (96.2%) | 6136 | 433 (7.1%) | 5703 (92.9%) | 6136 | 490 (8%) | 5646 (92%) | 6136 |
| Estimated fetal weight > 90th percentile (screen-positive) | 35 (4.6%) | 732 (95.4%) | 767 | 4 (0.5%) | 763 (99.5%) | 767 | 273 (35.6%) | 494 (64.4%) | 767 |
| Total | 345 | 7325 | 7670 | 768 | 6902 | 7670 | 767 | 6903 | 7670 |
aValues are absolute numbers (% of total within the corresponding screening category)