Head circumference at birth
Length of baby at birth (inches)
Weight of baby at birth (lbs)
Gestational age at birth (weeks)
Smoker
Age of mother
Number of cigarettes smoked by mother (per day)
Maternal height
Mothers pre-pregnancy weight (lbs)
Father's age
Fathers years in education
Number of cigarettes smoked by father (per day)
Height of father
Low birth weight baby