Table 1 The characteristics of the study group in the DNA methylation analysis by delivery mode
From: The impact of cesarean delivery on infant DNA methylation
| Â | DNA methylation chip analysis | DNA methylation validation analysis | ||||
|---|---|---|---|---|---|---|
VD (n = 30) | CDMR (n = 30) | p | VD (n = 40) | CDMR (n = 40) | p | |
Gestational age (weeks) | Â | 1.00 | Â | Â | 0.14 | |
 37 | 2 (6.7) | 1 (3.3) |  | 2 (5.0) | 1 (2.5) |  |
 38 | 8 (26.7) | 7 (23.3) |  | 7 (17.5) | 11 (27.5) |  |
 39 | 14 (46.7) | 15 (50.0) |  | 12 (30.0) | 18 (45.0) |  |
  ≥ 40 | 6 (20.0) | 7 (23.3) |  | 19 (47.5) | 10 (25.0) |  |
Birthweight (grams) | 3281 ± 287 | 3392 ± 262 | 0.12 | 3392 ± 295 | 3430 ± 295 | 0.57 |
Parity | Â | Â | 0.49 | Â | Â | 0.24 |
 0 | 28 (93.3) | 30 (100) |  | 37 (92.5) | 40 (100) |  |
  ≥ 1 | 2 (6.7) | 0 (0) |  | 3 (7.5) | 0 (0) |  |
Maternal age (years) | Â | 0.62 | Â | Â | 0.25 | |
  < 25 | 4 (13.3) | 3 (10.0) |  | 3 (7.5) | 2 (5.0) |  |
 25–29 | 14 (46.7) | 18 (60.0) |  | 21 (52.5) | 21 (52.5) |  |
 30–34 | 7 (23.3) | 7 (23.3) |  | 16 (40.0) | 13 (32.5) |  |
  ≥ 35 | 5 (16.7) | 2 (6.7) |  | 0 (0) | 4 (10.0) |  |
Pre-pregnancy BMI (kg/m2) | Â | Â | 0.73 | Â | Â | 0.74 |
  < 18.5 | 6 (20.0) | 4 (13.3) |  | 8 (20.0) | 5 (12.5) |  |
 18.5–24.9 | 24 (80.0) | 25 (83.3) |  | 29 (72.5) | 30 (75.0) |  |
 25.0–29.9 | 0 (0) | 1 (3.3) |  | 3 (7.5) | 4 (10.0) |  |
  ≥ 30 | 0 (0) | 0 (0) |  | 0 (0) | 1 (2.5) |  |
Han ethnicity | 29 (96.7) | 28 (93.3) | 1.00 | 40 (100) | 39 (97.5) | 1.00 |
Male fetus | 10 (33.3) | 16 (53.3) | 0.19 | 22 (55.0) | 23 (57.5) | 1.00 |
Maternal education | Â | 0.24 | Â | Â | 0.09 | |
 High school and below | 2 (6.7) | 2 (6.7) |  | 8 (20.0) | 2 (5.0) |  |
 College | 21 (70.0) | 26 (86.7) |  | 31 (77.5) | 37 (92.5) |  |
 Postgraduate | 7 (23.3) | 2 (6.7) |  | 1 (2.5) | 1 (2.5) |  |