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Table 1 Summary statistics

From: Analysis of neonatal mortality:is standardizing for relative birth weight biased?

  

Blacks

Whites

Total

Birth weight(grams)

N

3,683,572

18,409,287

22,092,859

 

Mean

3125

3395

3345

 

SD

633

572

591

Estimated optimal birth weight (grams)*

 

3550

4150

3950

Gestational age (weeks)

Mean

38.5

39.2

39.0

 

SD

3.0

2.3

2.5

Percent

<32 weeks

3.4

1.1

1.5

 

<34 weeks

5.9

2.2

2.8

 

<37 weeks

17.0

8.8

10.1

Percent

<1500 g

2.6

0.9

1.1

 

<2500 g

12.4

5.5

6.7