Table 3.
Baseline characteristics of the study population
| Total (n=271) | Participants (n=244) | Non-participants (n=27) | Difference or OR (95% CI) | |
|---|---|---|---|---|
| Girls n (%) | 150 (55) | 135 (55) | 15 (56) | −0.99 (−2.21 to 0.44)† |
| Age (years) | 6.4 (1.4) | 6.4 (1.4) | 6.3 (1.7) | 0.12 (−0.52 to 0.08)* |
| Ethnicitya n (%) | ||||
| New Zealand European and others | 200 (74) | 182 (75) | 18 (67) | 1.00 |
| Maori | 50 (19) | 43 (18) | 7 (26) | 0.61 (0.24 to 1.55)† |
| Pacific | 20 (7) | 18 (7) | 2 (7) | 0.89 (0.18 to 4.19)† |
| Household deprivationb | 5.1 (2.9) | 5.1 (2.6) | 5.0 (2.6) | 0.06 (−1.12 to 0.99)* |
| Maternal age (years)c | 37.0 (5.8) | 37.0 (5.7) | 36.7 (7.1) | 0.00 (−0.01 to 0.01)* |
| Maternal educationd | ||||
| Some secondary school n (%) | 86 (32) | 79 (33) | 7 (12) | 1.00 |
| Completed secondary school or tertiary education (not University) | 91 (34) | 79 (33) | 12 (44) | 0.58 (0.21 to 1.55)† |
| University degree | 91 (34) | 83 (34) | 8 (30) | 0.92 (0.32 to 2.64)† |
| Maternal BMIe (kg/m2) | 29.1 (6.2) | 29.2 (6.4) | 28.6 (4.4) | 0.63 (−1.25 to 2.50)* |
| Height (cm) | 120.7 (11.2) | 120.9 (11.0) | 118.8 (12.4) | 2.09 (−2.76 to 6.94)* |
| Weight (kg) | 28.7 (7.8) | 28.9 (7.8) | 27.5 (7.4) | 1.39 (−1.52 to 4.32)* |
| BMI z-score | 1.61 (0.45) | 1.61 (0.46) | 1.56 (0.36) | 0.04 (−0.10 to 0.19)* |
Data were missing for 1a, 9b, 9c, 3d and 13e participants from the total n=271. Data are all expressed as mean (SD) except where indicated as n (%).
Presented as *difference or †ORs as shown.