Table 1. Maternal and infant characteristics and smoking, by maternal prenatal smoking status on the birth certificate, Washington State 2007.
| Did not smoke during pregnancy N=100b |
Smoked during pregnancya N=100b |
|
|---|---|---|
| n (%) | n (%) | |
| Mother's race/ethnicity | ||
| Caucasian | 46 (48) | 81 (82) |
| Hispanic | 29 (30) | 7 (7) |
| Asian/Pacific Islander | 13 (14) | 3 (3) |
| African American | 5 (5) | 3 (3) |
| Native American | 3 (3) | 5 (5) |
| Male infant | 53 (53) | 56 (56) |
| Preterm (<37 weeks) | 3 (3) | 5 (5) |
| Low birth weight (<2500 grams) | 1 (1) | 3 (3) |
| Mean (SDc) | Mean (SDc) | |
| Birth to blood collection (hours) | 23.2 (8.8) | 23.4 (8.3) |
| Cigarettes smoked/dayd | ||
| Before pregnancye | 12.0 (11.3) | 21.3 (14.6) |
| 1st trimester | n/a | 20.5 (14.9) |
| 2nd trimester | n/a | 17.9 (14.6) |
| 3rd trimester | n/a | 14.7 (10.9) |
a
25 infants from each of four maternal smoking levels (low (<10), medium (10 -<20), high (20 -<30), very high (≥30) cigarettes/day)
b
May not add to totals due to missing data; percent among those with complete data
c
Standard deviation
d
Among those smoking during the specified period: 2 prenatal non-smokers and 97 prenatal smokers who smoked prior to pregnancy; and 98 prenatal smokers who smoked during the 1st trimester, 82 during the 2nd trimester and 76 during the 3rd trimester
e
3 months prior to conception