Original cohort | Main analysis set | |||||
---|---|---|---|---|---|---|
Parameter | N | % or Mean (SD) | N | % or Mean (SD) | P value* | |
Gender | Male | 3579 | 51.7 | 1025 | 49.4 | 0.06 |
Female | 3348 | 48.3 | 1052 | 50.6 | ||
Gestation (weeks) | 6927 | 39.6 (1.27) | 2077 | 39.6 (1.28) | 1 | |
Birth weight (g) | 6926 | 3430 (469) | 2077 | 3438 (462) | 0.5 | |
Z-score of birth weight | 6925 | 0.05 (0.98) | 2077 | 0.08 (0.96) | 0.2 | |
Z-score of weight at 6 months | 5451 | −0.19 (1.44) | 2077 | −0.17 (1.2) | 0.6 | |
Z-score of weight gain 0–6 months | 5450 | −0.25 (1.50) | 2077 | −0.25 (1.27) | 1 | |
Absolute weight at 5 years (kg) | 3827 | 20.5 (3.1) | 1910 | 20.5 (3.0) | 1 | |
Z-score weight at 5 years | 3927 | 0.25 (1.01) | 1910 | 0.28 (0.99) | 0.7 | |
Z-score of early childhood weight gain 0–5 years | 3826 | 0.16 (1.19) | 1910 | 0.14 (1.17) | 1 | |
Height at 21 years (cm) | 2550 | 171.7 (9.2) | 2077 | 172 (9.3) | 0.3 | |
Weight at 21 years (kg) | 2522 | 71.7 (16.2) | 2077 | 71.7 (16.2) | 1 | |
BMI at 21 years (kg/m2) | 2522 | 24.2 (4.96) | 2077 | 24.2 (4.9) | 1 | |
Waist circumference (cm) | 2523 | 81.7 (12.4) | 2074 | 81.7 (12.3) | 1 | |
Waist to hip ratio | 2520 | 0.83 (0.08) | 2072 | 0.83 (0.08) | 1 | |
Breast feeding | Yes ≥4 months | 1911 | 29.9 | 731 | 35.3 | <0.001 |
Yes <4 months | 3142 | 49.1 | 1000 | 48.2 | ||
Not at all | 1344 | 21 | 342 | 16.5 | ||
Parity–previous births | No birth | 2804 | 40.5 | 863 | 41.6 | 0.1 |
1 | 2128 | 30.7 | 650 | 31.3 | ||
2 | 1186 | 17.1 | 361 | 17.4 | ||
≥3 | 809 | 11.7 | 203 | 9.8 | ||
Mother’s education–FVC | Incomplete high | 1240 | 18.1 | 318 | 15.4 | <0.001 |
Complete high | 4422 | 64.3 | 1322 | 64.1 | ||
Post high | 1213 | 17.6 | 424 | 20.5 | ||
Parents’ racial background | Caucasian | 6008 | 89.4 | 1885 | 93.3 | <0.001 |
Asian | 290 | 4.3 | 68 | 3.4 | ||
Abor-Islander | 424 | 6.3 | 68 | 3.4 | ||
Maternal smoking–FVC | None | 4271 | 62.2 | 1373 | 66.6 | 0.001 |
Smoker | 2010 | 29.3 | 545 | 26.4 | ||
Heavy | 581 | 8.5 | 143 | 6.9 | ||
Mother’s age at birth (years) | 6927 | 25.5 (5.10) | 2077 | 26.0 (5. 0) | <0.001 | |
Mother’s Pre-pregnancy BMI (kg/m2) | 6395 | 21.9 (3.90) | 1958 | 21.9 (3.7) | 0.8 |