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