Predictor | Unadjusted | Adjusteda(n = 170) | |||||
---|---|---|---|---|---|---|---|
n | Ratio of geometric means | 95% CI | P-value | Ratio of geometric means | 95% CI | P-value | |
Maternal age at birth (years) | 176 | - | - | - | - | - | - |
Fractional polynomial transformed predictors | - | - | - | < 0.001 | - | - | - |
20 | - | 1.00 | - | - | - | - | - |
25 | - | 0.23 | 0.12–0.44 | - | - | - | - |
30 | - | 0.16 | 0.07–0.34 | - | - | - | - |
35 | - | 0.16 | 0.08–0.33 | - | - | - | - |
40 | - | 0.17 | 0.09–0.34 | - | - | - | - |
Linear predictor | - | - | - | - | 0.97 | 0.95–1.00 | 0.030 |
Maternal prioritized ethnicity | 176 | - | - | 0.053 | - | - | 0.649 |
European | - | 1.00 | - | - | 1.00 | - | - |
Māori | - | 1.79 | 1.12–2.88 | - | 1.21 | 0.75–1.95 | - |
Other | - | 0.98 | 0.67–1.43 | - | 0.92 | 0.64–1.32 | - |
Maternal BMI pre-pregnancy (per unit) | 174 | 1.01 | 0.99–1.03 | 0.297 | - | - | - |
Maternal education | 173 | - | - | < 0.001 | - | - | 0.042 |
Year 11 or lower | - | 1.00 | - | - | 1.00 | - | - |
Year 12 or 13 | - | 0.50 | 0.31–0.80 | - | 0.61 | 0.37–1.00 | - |
Post-secondary | - | 0.39 | 0.23–0.64 | - | 0.52 | 0.31–0.87 | - |
Degree or higher | - | 0.33 | 0.21–0.51 | - | 0.52 | 0.33–0.83 | - |
Maternal employment | 176 | - | - | 0.001 | - | - | 0.031 |
Not working | - | 1.00 | - | - | 1.00 | - | - |
Full-time, part-time, casual | - | 0.64 | 0.52–0.79 | - | 0.79 | 0.64–0.98 | - |
Parity (per birth) | 176 | 1.15 | 1.05–1.27 | 0.004 | 1.13 | 1.01–1.26 | 0.028 |
EPDS (per point) | 175 | 1.06 | 1.03–1.09 | < 0.001 | 1.03 | 1.00–1.06 | 0.036 |
Stress (per point) | 175 | 1.02 | 0.99–1.06 | 0.177 | 1.01 | 0.98–1.05 | 0.353 |
AUDIT-C (per point) | 140 | 0.97 | 0.84–1.11 | 0.657 | - | - | - |
Living arrangements | 176 | - | - | 0.697 | - | - | - |
Without partner or family | - | 1.00 | - | - | - | - | - |
With partner | - | 1.35 | 0.57–3.19 | - | - | - | - |
With family | - | 1.55 | 0.56–4.28 | - | - | - | - |
NZDep2006 (per decile) | 173 | 1.02 | 0.97–1.06 | 0.489 | - | - | - |
Family income (NZDb) | 176 | - | - | < 0.001 | - | - | 0.062 |
≤$30,000 | - | 1.00 | - | - | 1.00 | - | - |
-$70,000 | - | 0.93 | 0.62–1.39 | - | 0.94 | 0.63–1.41 | - |
Over $70,000 | - | 0.62 | 0.41–0.92 | - | 0.77 | 0.51–1.17 | - |
Not provided | - | 1.39 | 0.81–2.37 | - | 1.38 | 0.80–2.38 | - |
Gestation (per week) | 176 | 0.98 | 0.90–1.07 | 0.708 | - | - | - |
Infant sex | 176 | - | - | 0.246 | - | - | 0.283 |
Girl | - | 1.00 | - | - | 1.00 | - | - |
Boy | - | 0.88 | 0.70–1.10 | - | 0.90 | 0.73–1.10 | - |