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Table 4 Number of neonatal deaths, number of babies, and absolute risk according to achieved birth weight and birth weight ratio& among 360523 second-born term babies (37–41 weeks) whose older sibling were alive at the first birthday (504 neonatal deaths) (Denmark, 1979–2002).

From: Assessing fetal growth impairments based on family data as a tool for identifying high-risk babies. An example with neonatal mortality

Birth Weight Ratio &

Achieved birth weight

 
  

<1500 g

1500–1999 g

2000–2499 g

2500–2999 g

3000–3499 g

3500–3999 g

>= 4000 g

Total

< 50%

Deaths

37

14

0

0

0

0

0

51

 

Babies

67

33

0

0

0

0

0

100

 

Absolute risk †

552.24

424.24

-

-

-

-

-

510.00

50–60%

Deaths

1

13

8

0

0

0

0

22

 

Babies

9

147

85

1

0

0

0

242

 

Absolute risk †

-

88.44

94.12

-

-

-

-

90.91

60–70%

Deaths

0

1

21

5

0

0

0

27

 

Babies

0

140

856

233

6

0

0

1235

 

Absolute risk †

-

-

24.53

21.46

-

-

-

21.86

70–80%

Deaths

0

0

20

30

3

0

0

53

 

Babies

0

44

1829

6047

1153

16

0

9098

 

Absolute risk †

-

-

10.93

4.96

2.60

-

-

5.83

80–90%

Deaths

0

0

3

43

54

6

0

106

 

Babies

0

6

935

17559

28852

3231

39

50622

 

Absolute risk †

-

-

3.20

2.45

1.87

1.86

-

2.09

90–110% *

Deaths

0

0

1

12

88

76

27

204

 

Babies

0

1

162

9092

83708

113119

31627

237709

 

Absolute risk †

-

-

-

1.31

1.05

0.67

0.85

0.86

110–120%

Deaths

0

0

0

0

1

16

14

31

 

Babies

0

0

2

116

2408

15527

30146

48199

 

Absolute risk †

-

-

-

-

-

1.03

0.46

0.64

>= 120%

Deaths

0

0

0

0

1

1

8

10

 

Babies

0

0

2

20

279

1842

11184

13327

 

Absolute risk †

-

-

-

-

-

-

0.71

0.75

Total

Deaths

38

28

53

90

147

99

49

504

 

Babies

76

371

3871

33068

116406

133735

72996

360523

 

Absolute risk †

500.00

75.47

13.69

2.72

1.26

0.74

0.67

1.39

  1. & Achieved birth weight divided by predicted birth weight times 100
  2. † Crude absolute risk of neonatal death per 1000 babies.
  3. * Babies who achieved their predicted birth weight within +/- 10%.
  4. - indicates that the data were too sparse to provide a reliable estimate
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BMC Pregnancy and Childbirth

ISSN: 1471-2393

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