lbw: Low Birth Weight

lbwR Documentation

Low Birth Weight

Description

The is a modified version of the low birth weight (lbw) data, obtained from Hosmer and Lemeshow (2000).

Usage

data(lbw)

Details

id

Subject's identifier

low

1=low birthweight baby (under 2500g); 0=norml weight (2500g or over)

age

age of mother in years

lwt

weight of mother (lbs) at last menstrual period

race

factor: white; black; 3=other

smoke

1=history of mother smoking; 0=mother nonsmoker

ptl

number of false of premature labors: 0-3

ht

1=history of hypertension; 0 =no hypertension

ui

1=uterine irritability; 0 no irritability

ftv

number of physician visits in 1st trimester

bwt

birth weight in grams

Value

A data frame with 189 rows and 11 variables.

Source

Modified from Hosmer, D and S. Lemeshow (2000), Applied Logistic Regression, Wiley.

Examples

data(lbw)

statcourses/dsEssex documentation built on March 26, 2022, 3:47 a.m.