Table 3 Association Between Maternal Age and Adverse Perinatal and Neonatal Outcomes

Low birthweight (<2500 grams)

10-19

1.52**

(1.27, 1.84)

1.36**

(1.12, 1.66)

20-24

1.00 (ref)

 -

1.00 (ref)

 -

25-34

1.06

(0.91, 1.24)

1.26*

(1.05, 1.51)

35+

1.18

(0.94, 1.49)

1.61**

(1.18, 2.20)

Preterm birth

10-19

1.53**

(1.18, 1.98)

1.40*

(1.06, 1.84)

20-24

1.00 (ref)

 -

1.00 (ref)

 -

25-34

1.27*

(1.03, 1.56)

1.44**

(1.12, 1.85)

35+

1.49*

(1.10, 2.02)

1.80**

(1.20, 2.71)

Resuscitation needed at birth

10-19

0.74*

(0.57, 0.95)

0.71*

(0.54, 0.92)

20-24

1.00 (ref)

 -

1.00 (ref)

 -

25-34

0.95

(0.80, 1.14)

0.92

(0.74, 1.14)

35+

0.70*

(0.51, 0.96)

0.62*

(0.41, 0.93)

Stillbirth

10-19

1.32

(0.81, 2.14)

1.22

(0.74, 2.02)

20-24

1.00 (ref)

 -

1.00 (ref)

 -

25-34

1.19

(0.81, 1.75)

1.40

(0.90, 2.19)

35+

1.71

(1.01, 2.88)

2.35*

(1.15, 4.78)

Death in first 7 days after birth

10-19

0.98

(0.56, 1.70)

1.04

(0.59, 1.87)

20-24

1.00 (ref)

 -

1.00 (ref)

 -

25-34

0.97

(0.64, 1.47)

0.84

(0.51, 1.39)

35+

1.13

(0.60, 2.12)

0.80

(0.34, 1.87)

Death in first 28 days after birth

10-19

0.85

(0.50, 1.44)

0.90

(0.52, 1.57)

20-24

1.00 (ref)

 -

1.00 (ref)

 -

25-34

0.96

(0.66, 1.40)

0.84

(0.53, 1.32)

35+

1.2

(0.70, 2.12)

0.88

(0.41, 1.89)

Any adverse neonatal outcomes^a

10-19

1.08

(0.92, 1.26)

0.99

(0.84, 1.16)

20-24

1.00 (ref)

 -

1.00 (ref)

 -

25-34

1

(0.89, 1.13)

1.09

(0.94, 1.26)

35+

0.97

(0.80, 1.17)

1.10

(0.85, 1.41)