Observation number
Birth weight (gms.)
Mother's race
Mother's race (3 categories)
Mother's age in years
Mother's education
Mother's marital status
Father's race
Father's age
Total birth order
# of prenatal visits
Weight gain (lbs)
Cigarettes 1st trimester
Cigarettes 2nd trimester
Cigarettes 3rd trimester
Preg. assoc. hypertension
Multiple birth
Gestation length (weeks)
Male child
Cesarean section
Apgar score at 5 min.
Apgar recoded