Table 2 Sample collection characteristics as multivariate predictors of gene expression.
|  | CYP19/18S (square root) | PPARγ/18S (log) |
|---|---|---|
Mean (SD) by placenta | -0.34 (1.1) | -4.70 (1.4) |
Characteristic | β coefficient (SE) p-value | |
Delivery method | ||
   Vaginal vs. c-section | 0.28 (0.39) p = 0.50 | 0.52 (0.31) p = 0.15 |
Time Elapsed since delivery up to 30 minutes (<= 10 minutes is referent) | ||
   11 – 20 minutes | -0.82 (0.39) p = 0.08 | -1.24 (0.32) p = 0.008 |
   21 – 30 minutes | -1.99 (0.30) p = 0.0005 | -2.12 (0.40) p = 0.002 |
   p-value for trend | 0.009 | 0.002 |
Regional differences | ||
   Inner vs. outer | 0.04 (0.15) p = 0.77 | 0.20 (0.18) p = 0.26 |