Table 1.
Baseline characteristics of mothers and infants from a regional metropolitan referral hospital in the Illawarra region of New South Wales, Australia, June 2014–March 2016
| Preterm (n 85) | Term (n 65) | ||||
|---|---|---|---|---|---|
| Median or n | IQR or % | Median or n | IQR or % | P value | |
| Mother | |||||
| Age (years) | 30·7 | 28·4–35·5 | 30·2 | 26·1–35·6 | 0·39 |
| BMI†,‡ (kg/m2) | 22·0 | 20·3–27·2 | 24·9 | 21·1–27·8 | 0·03 |
| Healthy (<25 kg/m2) | 52 | 61 | 29 | 45 | |
| Overweight (≥25 kg/m2) | 25 | 29 | 30 | 46 | |
| Maternal education‡,§ | 0·57 | ||||
| <Year 12 | 44 | 52 | 31 | 48 | |
| ≥Year 12 | 40 | 47 | 34 | 52 | |
| Maternal country of birth∥ | 0·42 | ||||
| Australia | 80 | 94 | 60 | 92 | |
| China | 2 | 2 | 1 | 2 | |
| Europe | 2 | 2 | 1 | 2 | |
| Indonesia | 1 | 1 | 0 | 0 | |
| India or Pakistan | 0 | 0 | 2 | 3 | |
| Palestine | 0 | 0 | 1 | 2 | |
| Infant | |||||
| Gestational age (weeks) | 33·5 | 32·0–35·2 | 39·0 | 38·1–40·1 | 0·001 |
| Birth weight (kg) | 2·0 | 1·6–2·3 | 3·3 | 3·0–3·7 | 0·001 |
| Birth length (cm) | 43·5 | 41·0–46·0 | 50·0 | 48·0–51·0 | 0·001 |
| Birth percentile∥ | 28·0 | 14·0–53·0 | 55·0 | 25·0–83·0 | 0·001 |
| SGA (<10 %) | 13 | 15 | 10 | 15 | |
| AGA (10–90 %) | 70 | 82 | 47 | 72 | |
| LGA (>90 %) | 2 | 2 | 8 | 12 | |
| Gender | 0·14 | ||||
| Male | 56 | 66 | 35 | 54 | |
| Female | 29 | 34 | 30 | 46 | |
IQR, interquartile range; SGA, small for gestational age; AGA, appropriate for gestational age; LGA, large for gestational age.
Continuous data are presented as median and IQR, categorical data as n and %.
†
Preterm, n 77; term, n 59.
‡
The percentages for maternal BMI sub-categories (healthy and overweight) and maternal education (preterm infants) do not add up to 100 % due to missing data.
§
Preterm, n 84.
∥
The percentages for maternal country of birth and birth percentile do not add up to 100 % due to rounding of percentage values.