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Table 5 Birth characteristics and civil status by maternal age when giving birth and type of pregnancy a

From: Evaluation of risk factors’ importance on adverse pregnancy and neonatal outcomes in women aged 40 years or older

 

ART

Spontaneous

≤39

40–44

≥45

p-valueb

≤39

40-44

≥45

p-valueb

n (%)

n (%)

n (%)

n (%)

n (%)

n (%)

Civil status

   

< 0.001

   

< 0.001

Married/ cohabiting

1859 (98.2)

2651 (94.2)

227 (91.2)

 

62,200 (89.4)

27,455 (84.2)

1575 (79.5)

 

Single status at registration

35 (1.8)

162 (5.8)

22 (8.8)

 

7378 (10.6)

5161 (15.8)

405 (20.5)

 

Parity

       

< 0.001

Primiparous

872 (46.0)

1318 (46.9)

120 (48.2)

0.754

14,788 (21.3)

6099 (18.7)

377 (19.0)

 

Multiparous

1022 (54.0)

1495 (53.1)

129 (51.8)

 

54,790 (78.7)

26,517 (81.3)

1603 (81.0)

 

Twin

   

< 0.001

   

< 0.001

No

1404 (74.1)

2381 (84.6)

170 (68.3)

 

67,048 (96.4)

31,675 (97.1)

1863 (94.1)

 

Yes

490 (25.9)

432 (15.4)

79 (31.7)

 

2530 (3.6)

941 (2.9)

117 (5.9)

 

Gestational age

   

< 0.001

   

< 0.001

At term, 37–42 weeks

1556 (82.2)

2454 (87.2)

190 (76.3)

 

65,066 (93.6)

30,223 (92.8)

1787 (90.4)

 

Post term, > 42 weeks

4 (0.2)

11 (0.4)

1 (0.4)

 

241 (0.3)

116 (0.4)

7 (0.4)

 

Preterm, 32–36 weeks

277 (14.6)

284 (10.1)

49 (19.7)

 

3593 (5.2)

1872 (5.7)

138 (7.0)

 

Very preterm, < 32 weeks

57 (3.0)

64 (2.3)

9 (3.6)

 

623 (0.9)

372 (1.1)

45 (2.3)

 

Birthweight

   

< 0.001

   

< 0.001

Normal birthweight, ≥2500 g

1614 (85.5)

2526 (90.0)

193 (77.8)

 

66,533 (95.8)

30,834 (94.8)

1831 (92.6)

 

Low birthweight, 1500 g-2499 g

230 (12.2)

228 (8.1)

45 (18.1)

 

2403 (3.5)

1330 (4.1)

108 (5.5)

 

Very low birthweight, < 1500 g

44 (2.3)

52 (1.9)

10 (4.0)

 

490 (0.7)

1330 (1.1)

38 (1.9)

 

Size for gestational age

   

0.255

   

< 0.001

AGA1

1788 (94.4)

2637 (93.7)

226 (90.8)

 

65,319 (93.9)

30,073 (92.2)

1826 (92.2)

 

SGA2

42 (2.2)

72 (2.6)

10 (4.0)

 

1239 (1.8)

915 (2.8)

53 (2.7)

 

LGA3

64 (3.4)

104 (3.7)

13 (5.2)

 

3020 (4.3)

1628 (5.0)

101 (5.1)

 
  1. aNumbers may not add up to the total due to partially missing data
  2. bPearson’s chi-square
  3. 1Appropriate for gestational age
  4. 2Small for gestational age
  5. 3Large for gestational age