Table 2 Correlations between maternal smoking, smoking in previous pregnancies, and internalizing behaviors in children at 18 months, 36 months, and 5 years
Maternal smoking early pregnancy (dichotomized) | Maternal smoking early pregnancy (cigarettes per day) | Maternal smoking late pregnancy (dichotomized) | Maternal smoking in previous pregnancy | Internalizing behaviors (18 months) | Internalizing behaviors (36 months) | Internalizing behaviors (5 years) | |
|---|---|---|---|---|---|---|---|
Maternal smoking early pregnancy (dichotomized) | 1 | ||||||
Maternal smoking early pregnancy (cigarettes per day) | n/a | 1 | |||||
Maternal smoking late pregnancy (dichotomized) | 0.840** | 0.822** | 1 | ||||
Maternal smoking in previous pregnancy | 0.534** | 0.519** | 0.519** | 1 | |||
Internalizing behaviors (18 months) | 0.065** | 0.065** | 0.057** | 0.067** | 1 | ||
Internalizing behaviors (36 months) | 0.051** | 0.050** | 0.043** | 0.073** | 0.354** | 1 | |
Internalizing behaviors (5 years) | 0.031** | 0.039** | 0.029** | 0.051** | 0.272** | 0.404** | 1 |