Table-1.
Participant Characteristics
| % or mean ± standard deviation | Total sample (n=47) |
|---|---|
| Age at intakea (yrs) | 24.5 ± 0.8 |
| Education (yrs) | 12.3 ± 0.2 |
| % Caucasian | 89% |
| % Married | 26% |
| Age of smoking initiation | 15.2 ± 0.5 |
| Minnesota Nicotine Withdrawal Scale Scores at intakea | 1.5 ± 0.1 |
| Time to first cigarette | |
| < 5 min | 19% |
| 6 to 30 min | 21% |
| 31 to 59 min | 19% |
| 1 to 2 hr | 26% |
| ≥ 2 hr | 15% |
| % Living with other smoker(s) | 76% |
| % with none or few friends/family who smoke | 24% |
| % with no smoking allowed at home | 57% |
| % attempted to quit before pregnancy | 77% |
a
Intake refers to when subjects were enrolled in the study during early pregnancy (estimated gestational age mean 12.5 ± standard deviation 4.5 weeks).