Gestational age difference (LMP − CRL), days | |||
---|---|---|---|
Number | Difference Mean (SD) | Difference of the difference (95 % CI)b | |
Years of school | |||
≤6 years | 168 | 4.22 (11.1) | Reference |
>6 years | 164 | 1.36 (10.01) | −2.86 (−5.15, −0.58) |
Age | |||
≤20 years | 123 | 4.25 (9.77) | Reference |
>20 years | 208 | 1.96 (11.13) | −2.28 (−4.66, 0.10) |
Early pregnancy BMI | |||
Underweight (<18.5 kg/m2) | 132 | 2.47 (10.25) | Reference |
Normal (≥18.5 kg/m2) | 200 | 3.03 (10.97) | 0.56 (−1.79, 2.92) |
Infant sex | |||
Male | 176 | 2.94 (10.77) | Reference |
Female | 156 | 2.66 (10.60) | −0.29 (−2.60, 2.02) |
Term statusc | |||
Term | 291 | 3.29 (10.72) | Reference |
Preterm | 29 | -1.57 (10.52) | −4.87 (−8.93, −0.80) |
Post-term | 12 | 1.58 (7.66) | −1.71 (−7.86, 4.44) |
SGAd | |||
Non-SGA | 170 | 2.38 (11.73) | Reference |
SGA | 119 | 2.96 (9.46) | 0.58 (−1.97, 3.13) |