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Table 1 Distribution of demographic variables among mothers/infants in HOME study

From: A prospective cohort study of biomarkers of prenatal tobacco smoke exposure: the correlation between serum and meconium and their association with infant birth weight

Variable

All Women

N = 389 (%)

Women with All Data N = 315 (%) *

Women Missing Any Data N = 74 (%)

Maternal Race

   

   White

237 (61.7)

209 (66.4)

28 (40.6)

   Black

121 (31.5)

86 (27.3)

35 (50.7)

   Other

26 (6.8)

20 (6.3)

6 (8.7)

   Missing

5

0

5

Maternal Education (years)

   

   < 12

41 (10.7)

23 (7.3)

18 (26.1)

   12

54 (13.8)

41 (13.0)

13 (18.8)

   > 12

289 (74.5)

251 (79.7)

38 (55.1)

   Missing

5

0

5

Marital Status

   

   Married

248 (64.6)

217 (68.9)

31 (44.9)

   Single

136 (35.4)

98 (31.1)

38 (55.1)

   Missing

5

0

5

Maternal Age Category (years)

   

   < 25

96 (24.7)

63 (20.0)

33 (44.6)

   25-34

231 (59.4)

197 (62.5)

34 (45.9)

   35+

62 (15.9)

55 (17.5)

7 (9.5)

   Missing

0

0

0

  1. *Women had all 3 serum cotinine measurements, both self-reported tobacco smoke interviews, meconium measurement, and infant birth outcome data.