Table 1.
Basic maternal demographic information for the birth data extracted from electronic medical records by year. There were no significant changes in these parameters between 2006 and 2015
| Birth year (N) | Non-Hispanic white (%) | Age at conception (years) | Pre-pregnancy BMIa | Postpartum BMI (N = 12,581)b | Systolic blood pressurec (mmHg) | Gestation length (days) |
|---|---|---|---|---|---|---|
| 2006 (418) | 96.9 | 26.2 ± 0.3 | 27.3 ± 0.3 | 29.2 ± 0.4 | 113.2/69.6 | 275.0 ± 0.4 |
| 2007 (1224) | 96.1 | 26.6 ± 0.2 | 27.7 ± 0.2 | 28.9 ± 0.2 | 112.9/69.3 | 275.7 ± 0.2 |
| 2008 (1063) | 96.6 | 26.7 ± 0.2 | 27.9 ± 0.2 | 29.6 ± 0.3 | 112.0/68.8 | 275.1 ± 0.2 |
| 2009 (1242) | 94.1 | 26.8 ± 0.2 | 27.4 ± 0.2 | 29.1 ± 0.2 | 112.1/69.0 | 276.2 ± 0.2 |
| 2010 (1103) | 95.1 | 27.1 ± 0.2 | 27.5 ± 0.2 | 29.2 ± 0.2 | 112.6/69.1 | 276.2 ± 0.2 |
| 2011 (2328) | 95.1 | 26.9 ± 0.1 | 27.8 ± 0.1 | 29.5 ± 0.2 | 112.5/68.6 | 277.1 ± 0.2 |
| 2012 (2486) | 93.6 | 26.8 ± 0.1 | 27.7 ± 0.1 | 29.2 ± 0.2 | 113.3/69.4 | 276.5 ± 0.1 |
| 2013 (2640) | 94.7 | 26.8 ± 0.1 | 28.2 ± 0.1 | 29.4 ± 0.2 | 113.5/69.5 | 276.7 ± 0.1 |
| 2014 (2915) | 93.4 | 27.0 ± 0.1 | 27.8 ± 0.1 | 29.5 ± 0.2 | 113.5/68.9 | 276.7 ± 0.1 |
| 2015 (2798) | 93.9 | 27.1 ± 0.1 | 28.2 ± 0.1 | 29.7 ± 0.2 | 113.5/69.6 | 276.9 ± 0.1 |
| Total (18,217) | 94.5 | 26.9 ± 0.1 | 27.8 ± 0.1 | 29.4 ± 0.1 | 113.1/69.2 | 276.5 ± 0.1 |
aCalculated from either a pre-pregnancy weight or the earliest prenatal visit weight within 30 days of estimated conception
bFrom the postpartum visit
cCalculated from either a pre-pregnancy measurement or a measurement taken at the earliest prenatal visit within 30 days of estimated conception