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Table 1 Demographic characteristics of 488,918 births according to maternal smoking habits during pregnancy, Colorado Birth Registry, 1989 to 1998.

From: Sudden Infant Death Syndrome and prenatal maternal smoking: rising attributed risk in the Back to Sleepera

 

Number (%)

Reported maternal smoking (%)

Sex

  

male

252,066 (51.6)

13.4

female

236,852 (48.4)

13.1

Gestational age

  

<37 weeks

16,057 (3.3)

14.7

"term"

472,861 (96.7)

13.2

Marital status of mother

  

married

376,222 (77.0)

10.1

single

112,696 (23.0)

23.9

Time between births

  

12 months or less

19,987 (4.1)

16.0

>12 months

468,931 (95.9)

13.2

Maternal Age

  

17 years or less

21,362 (4.4)

17.1

18 to 34 years

407,801 (83.4)

13.7

35 years or more

59,755 (12.2)

8.9

Maternal Ethnicity

  

caucasian

351,051 (71.8)

14.3

hispanic

97,911 (20.0)

10.4

black

21,989 (4.5)

14.4

other/missing

17,967 (3.7)

8.5

Maternal Educational level

  

<high school

85,284 (17.4)

23.9

high school

157,852 (32.3)

17.9

some college

111,824 (22.9)

10.5

college

112,384 (23.0)

3.0

more than college

13,840 (2.8)

1.7

missing

7734 (1.6)

12.5

Maternal Alcohol use

  

none

477,733 (97.7)

12.6

1 to 50 drinks/week

11,185 (2.3)

42.8