Baseline variables by study group
| Comparison | Intervention | ||||||
|---|---|---|---|---|---|---|---|
| % | m (SD) | % | m (SD) | ||||
| Maternal age (years) | |||||||
| < 21 | 50.6 | 42.3 | |||||
| 22–30 | 35.7 | 40.8 | |||||
| > 30 | 35.0 | 16.9 | |||||
| Race/ethnicity | |||||||
| African American | 5.8 | 9.2 | |||||
| Hispanic | 1.3 | 2.8 | |||||
| White | 92.9 | 90.1 | |||||
| Other | 1.3 | 0.7 | |||||
| Married/living with partner | 60.4 | 53.5 | |||||
| Private Health insurance | 4.6 | 2.8 | |||||
| Gestational age (weeks) | 11.6 (5.8) | 11.7 (5.9) | |||||
| Primiparous | 46.4 | 37.3 | |||||
| Pregnancy unwanted | 22.1 | 28.2 | |||||
| Mental Health Index-5 | 54.1 (21.5) | 51.5 (23.5) | |||||
| Stage for pregnancy cessation | |||||||
| Precontemplation | 22.4 | 30.3 | |||||
| Contemplation | 46.7 | 41.5 | |||||
| Preparation | 30.9 | 28.2 | |||||
| Cigarettes per day | 12.2 (9.2) | 12.9 (8.3) | |||||
| < 31 minutes to first cigarette | 46.1 | 62.0 | |||||
| Urine cotinine value (median) | (n=131) | 3680 | (n=123) | 2510 | |||