Low birth weight

Data from 189 infants were collected in order to study risk factors for low birth weight (Hosmer and Lemeshow, 1989).

1. low: indicator of birth weight less than 2.5 kg.
2. age: mother's age in years.
3. lwt: mother's weight in pounds at last menstrual period.
4. race: mother's race is 1 if the mother is white, and 0 otherwise.
5. smoke: smoking status during pregnancy.
6. ptl: number of previous premature labours.
7. ht: history of hypertension.
8. ui: presence of uterine irritability.
9. ftv: number of physician visits during the first trimester.
10. bwt: birth weight in grams.

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