Experimental (n = 45) | Control (n = 45) | P-value | |
Age (months) | 17.2 ± 2.5 | 16.9 ± 2.6 | 0.51 |
Sex (% male) | 53.3% | 51.1% | 0.83 |
Height (cm) | 80.0 [76.0, 81.0] | 80.0 [75.5, 82.5] | 0.72 |
Mass (kg) | 11.4 ± 1.5 | 11.4 ± 1.4 | 0.89 |
Birth weight (kg) | 3.4 ± 0.5 | 3.4 ± 0.7 | 0.74 |
Head circumference (cm) | 34.7 ± 1.6 | 34.4 ± 1.6 | 0.48 |
Mother’s age group 31 - 35 years | 37.8% | 44.4% | 0.36 |
Father’s age group 31 - 35 years | 28.9% | 44.4% | 0.50 |
Mother’s education level (% tertiary) | 86.7% | 95.6% | 0.14 |
Father’s education level (% tertiary) | 77.8% | 95.6% | 0.38 |
Gestational term (37 - 42 weeks) | 97.8% | 95.6% | 0.56 |
Ethnicity (% Pākehā; NZ European) | 82.2% | 84.4% | 0.81 |
Birth order (% youngest born) | 57.8% | 35.6% | 0.04* |
Day-to-day care environment (% mostly home care with parent) | 68.9% | 68.9% | 0.95 |