Table 1. . Summary of the ELGAN study demographics for the sub cohort used in this analysis (n = 382) consisting of mothers that contributed placentas that were analyzed for sexually dimorphic miRNA and mRNA expression profiles. Subjects with missing data were not included in the percentage calculation.
| Variables | Overall (n = 382) |
Male (n = 201) |
Female (n = 181) |
p-value |
|---|---|---|---|---|
| n (%), or Mean (min–max) |
n (%), or Mean (min–max) |
n (%), or Mean (min–max) |
Chi-square for categorical, Kruskal–Wallis for continuous | |
| Gestational age (days) | 182.5 (161–195) | 181.6 (161–195) | 183.4 (161–195) | 0.04 |
| Maternal age (years) | 29.6 (14.0–45.8) | 30.0 (14.0–45.8) | 29.2 (16.5–45.1) | 0.15 |
| Race | 0.62 | |||
| – White | 235 (61.5) | 126 (62.7) | 109 (60.2) | |
| – Non-white | 147 (34.5) | 75 (37.3) | 72 (39.8) | |
| Ethnicity | 0.50 | |||
| – Non-Hispanic | 354 (92.7) | 188 (93.5) | 166 (91.7) | |
| – Hispanic | 28 (7.3) | 13 (6.5) | 15 (8.3) | |
| Smoking status | 0.61 | |||
| – Yes | 41 (10.9) | 20 (10.1) | 21 (11.8) | |
| – No | 334 (89.1) | 177 (89.9) | 157 (88.2) | |
| – Not reported | 7 | 4 | 3 | |
| Maternal prepregnancy BMI | 0.97 | |||
| – Underweight | 26 (7.1) | 13 (6.7) | 13 (7.4) | |
| – Normal | 198 (53.7) | 104 (53.6) | 94 (53.7) | |
| – Overweight | 66 (17.9) | 34 (17.5) | 32 (18.3) | |
| – Obese | 79 (21.4) | 43 (22.2) | 36 (20.6) | |
| – Not reported | 13 | 7 | 6 |
ELGAN: Extremely low gestational age newborns.