Table 2

Comparison of obstetrical (pregnancy and childbirth) outcomes based on maternal age n(%).

Variables

Total (n ​= ​8354)

Advanced-age (n ​= ​1855)

Adults (n ​= ​6499)

P-value

Gestational age

<0.001

Less than 37 weeks

1183 (14.2)

349 (18.8)

834 (12.8)

37–40 weeks

6050 (72.4)

1310 (70.6)

4740 (72.9)

40+1–41 weeks

942 (11.3)

169 (9.1)

773 (11.9)

More than 41 weeks

179 (2.1)

27 (1.5)

152 (2.3)

Parity

<0.001

Primiparous

2073 (24.8)

171 (9.2)

1902 (29.3)

Multiparous (2-5)

6044 (72.4)

1541 (83.1)

4503 (69.3)

Grand multiparous (6 parity or more)

237 (2.8)

143 (7.7)

94 (1.4)

Gestational Diabetes

<0.001

No

7038 (84.2)

1425 (76.8)

5613 (86.4)

GDM controlled with diet

774 (9.3)

223 (12)

551 (8.6)

GDM controlled with medications

513 (6.1)

198 (10.7)

315 (5)

Preeclampsia

<0.001

No

7803 (93.4)

1666 (89.8)

6137 (94.4)

Yes

551 (6.6)

189 (10.2)

362 (5.6)

Placenta abnormalities (previa/acreta)

0.038

No

8317 (99.6)

1837 (99)

6481 (99.7)

Yes

36 (0.4)

18 (1)

18 (0.3)

Placenta abruption

0.413

No

8086 (96.8)

1709 (96.5)

6296 (96.9)

Yes

268 (3.2)

65 (3.5)

203 (3.1)

Chorioamenionities

0.979

No

8326 (99.7)

1849 (99.6)

6477 (99.7)

Yes

28 (0.3)

6 (0.4)

22 (0.3)

Meconium fluid

0.001

No

7362 (88.1)

1674 (90.2)

5688 (87.5)

Yes

992 (11.9)

181 (9.8)

811 (12.5)

Fetal distress

0.505

No

7660 (91.7)

1694 (91.3)

5966 (91.8)

Yes

694 (8.3)

161 (8.7)

533 (8.2)

Fetal presentation

0.003

Cephalic

7998 (95.7)

1749 (94.2)

6249 (96.1)

Breech

318 (3.8)

93 (5)

225 (3.5)

Transverse

38 (0.5)

13 (0.7)

25 (0.4)

Method of delivery

<0.001

Normal vaginal delivery

5435 (65.1)

1032 (55.7)

4403 (67.7)

Vacuumed delivery

79 (0.9)

10 (0.5)

69 (1.1)

Cesarean section

2840 (34)

813 (43.8)

2027 (31.2)

Grade 3 or 4 of perineal lacerations

0.774

No

8349 (99.9)

1855 (100)

6494 (99.9)

Yes

5 (0.1)

0

5 (0.1)

Post-partum hemorrhage

<0.001

No

8105 (97)

1718 (92.6)

6387 (98.3)

Yes

249 (3)

137 (7.4)

112 (1.7)

Unfavorable maternal outcome

0.011

No

8265 (98.9)

1827 (98.45)

6438 (99.1)

Intensive care unit admission

59 (0.78)

27 (1.5)

32 (0.87)

Death

3 (0.03)

1 (0.05)

2 (0.03)

Newborn weight

<0.001

Low birth weight (Less than 2500 ​g)

1128 (13.5)

312 (16.8)

816 (12.6)

Normal weight (2500–4000 ​g)

7046 (84.3)

1514 (81.6)

5532 (85.1)

Macrosomia (More than 4000 ​g)

180 (2.2)

29 (1.6)

151 (2.3)

Intra uterine growth retardation

0.171

No

8095 (96.9)

1807 (97.4)

6288 (96.8)

Yes

259 (3.1)

48 (2.6)

211 (3.2)

Childbirth injury*

0.081

No

8326 (99.7)

1842 (99.3)

6484 (99.7)

Yes

28 (0.3)

13 (0.7)

15 (0.3)

Shoulder dystocia

0.169

No

8291 (99.2)

1846 (99.5)

6445 (99.2)

Yes

63 (0.8)

9 (0.5)

54 (0.8)

Neonatal congenital malformation

0.180

No

6957 (98.9)

1829 (98.6)

8261 (98.9)

Yes

76 (1.1)

26 (1.4)

93 (1.1)

Need for neonatal resuscitation

0.081

No

7594 (90.9)

1657 (89.3)

5937 (91.4)

The primary levels of resuscitation

517 (6.2)

130 (7)

387 (6)

Advanced levels of resuscitation

243 (2.9)

68 (3.7)

175 (2.6)

Neoborn asphyxia

0.606

No

8267 (99)

1838 (99.1)

6429 (98.9)

Yes

87 (1)

17 (0.9)

70 (1.1)

Unfavorable neonatal outcome

<0.001

No

6661 (79.7)

1402 (75.5)

5259 (80.9)

Stillbirth

91 (1.1)

33 (1.8)

58 (0.9)

Neonatal intensive care unit admission

1565 (18.8)

411 (22.2)

1154 (17.8)

Death

37 (0.4)

9 (0.5)

28 (0.4)

  • * Childbirth injury: Clavicle fracture, erb duchenne palsy, Klumpke palsy.