Mean difference (95% confidence interval) in offspring BMI at various ages, if the father began smoking before 11 years old.

<p>Mean difference (95% confidence interval) in offspring BMI at various ages, if the father began smoking before 11 years old.</p

Characteristics of fathers, mothers and offspring according to the father's age of smoking onset.

<p>Characteristics of fathers, mothers and offspring according to the father's age of smoking onset.</p

Unadjusted mean (SD) offspring BMI at various ages, according to father's age of smoking onset.

<p>Unadjusted mean (SD) offspring BMI at various ages, according to father's age of smoking onset.</p