Table 1

Descriptive characteristics of the RN offspring cohort, 1986-2000.

N

%


Total births

23,222

Singletons

22,613

97.4%

Stillbirths1

147

0.6%

Twins

581

2.5%

Triplets

28

0.1%

Live singletons

22,491

Only child

9,163

40.7%

2 children

8,454

37.6%

≥ 3 children

4,874

21.7%

Males

10,961

48.7%

Females

11,530

51.3%

RN mothers

12,741

Mother's age at birth

< 30 years

7,943

35.3%

30 - 34 years

9,371

41.7%

≥ 35 years

5,177

23.0%


1Value includes twins and triplets, and cases with missing or incomplete congenital anomaly diagnosis data.

Ratner et al. BMC Nursing 2010 9:15   doi:10.1186/1472-6955-9-15

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