Table 1 Demographic, medical, and obstetrical parameters in 3677 fetuses stratified by head circumference
Parameter | Normal HC | Microcephaly | p-Value |
|---|---|---|---|
N | 3651 | 26 | |
Age, years | 31.3 ± 5.0 | 32.3 ± 4.5 | 0.472 |
Gravidity | 2.7 ± 1.8 | 3.2 ± 2.9 | 0.359 |
Parity | 1.2 ± 1.4 | 1.4 ± 2.2 | 0.655 |
Nulliparity | 1355 (37.1%) | 10 (38.5%) | 1.000 |
Previous cesarean delivery | 157/2197 (7.2%) | 3/16 (18.8%) | 0.104 |
Sonographic biometry | |||
Estimated fetal weight (AC, FL), g | 3023.7 ± 731.5 | 2734.5 ± 353.9 | 0.334 |
Estimated fetal weight (AC, BPD), g | 3209.8 ± 557.60 | 2685.8 ± 420.8 | <.001 |
Head circumference, mm | 329.2 ± 15.4 | 306.1 ± 10.1 | <.001 |
Abdominal circumference, mm | 336.2 ± 24.6 | 323.2 ± 21.2 | <.007 |
Femur length, mm | 72.5 ± 4.4 | 72.1 ± 3.7 | 0.594 |
Bi-parietal diameter, mm | 91.3 ± 5.0 | 85.4 ± 3.8 | <.001 |
Chronic hypertension | 28/3257 (0.9%) | 0/20 (0%) | 1.000 |
Type 1 or type 2 pre-gestational diabetes | 74/3261 (2.3%) | 1/20 (5.0%) | 0.371 |