Pima.tr {MASS} | R Documentation

## Diabetes in Pima Indian Women

### Description

A population of women who were at least 21 years old, of Pima Indian heritage and living near Phoenix, Arizona, was tested for diabetes according to World Health Organization criteria. The data were collected by the US National Institute of Diabetes and Digestive and Kidney Diseases. We used the 532 complete records after dropping the (mainly missing) data on serum insulin.

### Usage

    data(Pima.tr)

### Format

These data frames contains the following columns:

`npreg`
  number of pregnancies
`glu`
  plasma glucose concentration in an oral glucose tolerance test
`bp`
  diastolic blood pressure (mm Hg)
`skin`
  triceps skin fold thickness (mm)
`bmi`
  body mass index (weight in kg/(height in m)^2)
`ped`
  diabetes pedigree function
`age`
  age in years
`type`
  `Yes` or `No`, for diabetic according to WHO criteria

### Details

The training set `Pima.tr` contains a randomly selected set of 200 subjects, and `Pima.te` contains the remaining 322 subjects. `Pima.tr2` contains `Pima.tr` plus 100 subjects with missing values in the explanatory variables.

### Source

Smith, J. W., Everhart, J. E., Dickson, W. C., Knowler, W. C. and Johannes, R. S. (1988) Using the ADAP learning algorithm to forecast the onset of diabetes mellitus. In Proceedings of the Symposium on Computer Applications in Medical Care (Washington, 1988), ed. R. A. Greenes, pp. 261–265. Los Alamitos, CA: IEEE Computer Society Press.

Ripley, B.D. (1996) Pattern Recognition and Neural Networks. Cambridge: Cambridge University Press.