Description

This version of the data set has been deprecated and will not be supported in future versions. Please use Birthwt instead.

Usage

Format

This data frame contains the following columns:

• low Indicator of birth weight less than 2.5kg

• bwt Birth weight in kilograms

• age1,age2,age3 Orthogonal polynomials of first, second, and third degree representing mother's age in years

• lwt1,lwt2,lwt3 Orthogonal polynomials of first, second, and third degree representing mother's weight in pounds at last menstrual period

• white,black Indicator functions for mother's race; "other" is reference group

• smoke smoking status during pregnancy

• ptl1,ptl2m Indicator functions for one or for two or more previous premature labors, respectively. No previous premature labors is the reference category.

• ht History of hypertension

• ui Presence of uterine irritability

• ftv1,ftv2,ftv3m Indicator functions for one, for two, or for three or more physician visits during the first trimester, respectively. No visits is the reference category.

See Also

Birthwt