Table 2.
Comparison of predicted weight by different formulas and actual birth weight by paired t-test.
| Verified samples (n = 68) | Macrosomia in verified samples (n = 8) | ||||
| Formula | Predicted fetal weight (g) | t value | P value | t value | P value |
| Model | 3518 ± 446 | −1.015 | 0.314 | 1.636 | 0.146 |
| Hadlock4 | 3553 ± 503 | −2.221 | 0.030 | 1.182 | 0.276 |
| Hadlock3 | 3514 ± 487 | −0.716 | 0.477 | 2.474 | 0.043 |
| Hadlock2 | 3589 ± 512 | −3.571 | 0.001 | 0.401 | 0.701 |
| Lee2009 (TVol) | 3403 ± 510 | 3.981 | <0.0001 | 2.227 | 0.061 |
| Lee2009 (AVol) | 3318 ± 469 | 8.959 | <0.0001 | 6.885 | <0.0001 |
| INTERGROWTH-21st | 3371 ± 467 | 4.468 | <0.0001 | 8.545 | <0.0001 |
AVol: Arm volume; TVol: Thigh volume.