Table 1.
Characteristics of women from the MoBa base sample at enrollment according to self-reported in utero exposure to tobacco smoke.
| Characteristic | n (%) | p-Valuea | |||
|---|---|---|---|---|---|
| All women | 479 | (28.0) | |||
| Age (years) | 0.07 | ||||
| < 25 | 43 | (27.9) | |||
| 25–29 | 183 | (34.4) | |||
| 30–34 | 179 | (21.8) | |||
| ≥ 35 | 74 | (27.0) | |||
| Education | < 0.01 | ||||
| < High school | 32 | (37.5) | |||
| High school | 141 | (39.0) | |||
| College | 214 | (22.9) | |||
| > College | 92 | (19.6) | |||
| Incomeb ($US) | 0.07 | ||||
| < 30,847 | 119 | (36.1) | |||
| 30,847–46,269 | 200 | (27.5) | |||
| 46,270–61,693 | 115 | (24.3) | |||
| > 61,693 | 45 | (17.8) | |||
| Parity | 0.71 | ||||
| 0 | 207 | (26.1) | |||
| 1 | 186 | (29.0) | |||
| ≥ 2 | 86 | (30.2) | |||
| BMI (kg/m2) | < 0.01 | ||||
| < 25.0 | 253 | (22.9) | |||
| 25.0 to < 30.0 | 161 | (28.6) | |||
| ≥ 30.0 | 65 | (46.2) | |||
| Smoking (cigarettes/day) | 0.02 | ||||
| Nonsmoker | 378 | (25.7) | |||
| < 10 | 87 | (33.3) | |||
| ≥ 10 | 14 | (57.1) | |||
| Alcohol drinking | 0.77 | ||||
| No (nondrinker) | 362 | (27.3) | |||
| Yes (drinker) | 73 | (31.5) | |||
| Missing | 44 | (27.3) | |||
| Physical activity (times/week) | 0.07 | ||||
| None | 99 | (38.4) | |||
| < 4.0 | 261 | (26.1) | |||
| 4.0 to < 7.5 | 89 | (24.7) | |||
| ≥ 7.5 | 30 | (20.0) | |||
| ap-Values are from Pearson’s chi-square test comparing exposed and unexposed across categories of each variable. bIndividual annual income. | |||||