Table 1.
Baseline demographics of the population (infant and maternal) by year.
| Birth year (n) | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | p-value for trend |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Baseline characteristics | |||||||||||
| Infant | |||||||||||
| Total infants | 105 | 96 | 101 | 95 | 94 | 101 | 111 | 87 | 97 | 61 | |
| Out-born | 22 | 20 | 19 | 21 | 14 | 23 | 32 | 23 | 21 | 12 | 0.34 |
| Birth gestation (weeks), median | 26.7 | 26.1 | 26.1 | 26.1 | 26.3 | 26.1 | 26.0 | 26.0 | 26.0 | 26.6 | |
| Birth weight (g), median | 930 | 800 | 770 | 765 | 830 | 850 | 802.5 | 850 | 752 | 890 | |
| Head circumference at birth (cm), median | 24.5 | 23.4 | 23.0 | 23.1 | 23.3 | 23.8 | 23.5 | 23.5 | 23.0 | 23.8 | |
| Male | 59 | 52 | 61 | 50 | 52 | 49 | 64 | 48 | 49 | 35 | 0.63 |
| Multiple birth | 36 | 24 | 22 | 26 | 16 | 27 | 20 | 24 | 21 | 5 | 0.01 |
| Major birth defect | £ | 5 | 11 | 5 | 5 | 10 | 5 | £ | £ | £ | 0.19 |
| Maternal | |||||||||||
| Non-White | 9 | 5 | 5 | 8 | 14 | 13 | £ | 11 | 13 | £ | 0.16 |
| Prenatal care | 104 | 92 | 100 | 95 | 92 | 95 | 109 | 86 | 96 | 58 | 0.56 |
| Chorioamnionitis (from 2008) | 19 | 7 | 21 | 24 | 21 | 15 | 15 | 18 | 6 | 0.71 | |
| Maternal hypertension, chronic or pregnancy-induced (from 2008) | 11 | 23 | 12 | 9 | 14 | 14 | 10 | 7 | 8 | 0.10 | |
| Antenatal steroids exposure | 91 | 74 | 83 | 76 | 80 | 91 | 91 | 78 | 82 | 52 | 0.12 |
| Vaginal delivery | 63 | 66 | 56 | 64 | 60 | 60 | 64 | 53 | 58 | 30 | 0.14 |
| Antenatal magnesium sulphate (from 2012) | £ | £ | 11 | 8 | 7 | 0.00 | |||||
£Values < 5 suppressed to prevent accidental identification.