Table 1 Distribution of select maternal and fetal characteristics by discrepancy in gestational age at 17 weeks’ gestation
Discrepancy (U/S GA – LMP GA) in gestational age [days] | |||||||
|---|---|---|---|---|---|---|---|
≤ −11 | −10 to −4 | −3 to +3 | +4 to +10 | ≥ 11 | Overall | p value* | |
[N = 34] | [N = 91] | [N = 291] | [N = 142] | [N = 14] | [N = 572] | ||
Maternal Characteristics | |||||||
Mean age† | 27.9 | 27.6 | 29.0 | 29.2 | 31.8 | 28.8 | 0.001 |
Mean height (cm) | 165.4 | 164.9 | 166.0 | 166.7 | 166.7 | 166.0 | 0.23 |
Mean pre-pregnancy weight (kg) | 63.7 | 58.6 | 59.5 | 58.8 | 63.0 | 59.5 | 0.03 |
Mean pre-pregnancy BMI (kg/m²) | 23.1 | 21.6 | 21.6 | 21.2 | 22.6 | 21.6 | 0.004 |
Education (%) | |||||||
Less than High School | 39.3 | 22.1 | 14.4 | 19.2 | 14.3 | 18.2 | 0.21 |
High School | 42.9 | 50.0 | 50.2 | 50.8 | 57.1 | 50.1 | |
College/Trade School | 14.3 | 19.8 | 26.9 | 23.9 | 14.3 | 24.0 | |
More than College | 3.6 | 8.1 | 8.5 | 6.2 | 14.3 | 7.8 | |
Parity (%) | |||||||
1 | 70.6 | 70.3 | 70.1 | 71.1 | 57.1 | 70.1 | 0.88 |
2 | 29.4 | 29.7 | 29.9 | 28.9 | 42.9 | 29.9 | |
Fetal Characteristics | |||||||
Mean birth weight (gms) | 3256.1 | 3337.1 | 3360.5 | 3459.3 | 3814.3 | 3386.2 | 0.05 |
Mean gestational age at delivery (weeks) ‡ | 42.7 | 40.5 | 39.8 | 39.9 | 39.0 | 40.1 | <0.0001 |
Sex (%) | |||||||
Male | 50.0 | 56.0 | 46.1 | 57.0 | 71.4 | 51.2 | 0.09 |
Female | 50.0 | 44.0 | 54.0 | 43.0 | 28.6 | 48.8 | |