Table 1 Characteristics of 954 mother–newborn pairs from the Boston Birth Cohort by maternal smoking status during pregnancy
No smoking | Smoking | Pa | |
|---|---|---|---|
N | 789 | 165 | |
Continuous variables [mean (SD)] | |||
Maternal age at delivery (years) | 28.4 (6.6) | 27.9 (6.1) | 0.329 |
Maternal pre-pregnancy BMI (kg/m2) | 26.7 (6.2) | 28.1 (7.0) | 0.007 |
Gestational age at delivery (weeks) | 38.7 (2.4) | 38.3 (2.7) | 0.058 |
Child birthweight (g) | 3169.1 (656.1) | 2910.5 (680.6) | < 0.001 |
Categorical variables, n (%) | |||
Parity (≥ 1 live birth) | 437 (55.4) | 92 (55.8) | 0.999 |
Maternal alcohol consumption | 45 (5.7) | 34 (20.6) | < 0.001 |
Maternal education level (> high school) | 286 (36.2) | 33 (20.0) | < 0.001 |
Maternal race | 0.457 | ||
Black | 566 (71.7) | 113 (68.5) | |
Non-Black | 223 (28.3) | 52 (31.5) | |
Maternal diabetes | 0.333 | ||
No | 700 (88.7) | 141 (85.5) | |
Gestational diabetes | 51 (6.5) | 16 (9.7) | |
Pregestational diabetes | 38 (4.8) | 8 (4.8) | |
Child sex (male) | 410 (52.0) | 94 (57.0) | 0.278 |