Table 1 Demographics of the analysed sample at 1, 2, 3.5, and 5 years of agea (n = 528)
Age (years) | ||||||
|---|---|---|---|---|---|---|
All | 1 | 2 | 3.5 | 5 | ||
N | 528 | 315 | 256 | 305 | 382 | |
Maternal age at child’s birth, mean (SD) years | 32.6 (4.6) | 32.9 (4.5) | 32.9 (4.4) | 33.0 (4.5) | 32.8 (4.5) | |
Primiparous, n (%) | 249 (47.2) | 159 (50.5) | 112 (43.8) | 134 (43.9) | 170 (44.5) | |
Maternal ethnicity, n (%) | European | 462 (87.5) | 282 (89.5) | 229 (89.5) | 270 (88.5) | 337 (88.2) |
Māori | 21 (4.0) | 11 (3.5) | 6 (2.3) | 11 (3.6) | 14 (3.7) | |
Other | 45 (8.5) | 22 (7.0) | 21 (8.2) | 24 (7.9) | 31 (8.1) | |
Maternal tertiary education, n (%) | 359 (68.0) | 224 (71.1) | 180 (70.3) | 205 (67.2) | 258 (67.5) | |
Household deprivation | Low | 196 (37.1) | 116 (36.8) | 104 (40.6) | 122 (40.0) | 142 (37.2) |
Medium | 231 (43.8) | 142 (45.1) | 106 (41.4) | 130 (42.6) | 168 (44.0) | |
High | 101 (19.1) | 57 (18.1) | 46 (18.0) | 53 (17.4) | 72 (18.9) | |
Infant sex, n (%) female | 256 (48.5) | 155 (49.2) | 117 (45.7) | 146 (47.9) | 191 (50.0) | |
BMI z-score at 5 years of age, mean (SD) | 0.46 (0.89) | 0.41 (0.84) | 0.43 (0.87) | 0.47 (0.87) | 0.48 (0.89) | |