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1. Title: Pima Indians Diabetes Database
2. Sources:
(a) Original owners: National Institute of Diabetes and Digestive and
Kidney Diseases
(b) Donor of database: Vincent Sigillito (
Research Center, RMI Group Leader
Applied Physics Laboratory
The Johns Hopkins University
Johns Hopkins Road
Laurel, MD 20707
(301) 953-6231
(c) Date received: 9 May 1990
3. Past Usage:
1. Smith,~J.~W., Everhart,~J.~E., Dickson,~W.~C., Knowler,~W.~C., \&
Johannes,~R.~S. (1988). Using the ADAP learning algorithm to forecast
the onset of diabetes mellitus. In {\it Proceedings of the Symposium
on Computer Applications and Medical Care} (pp. 261--265). IEEE
Computer Society Press.
The diagnostic, binary-valued variable investigated is whether the
patient shows signs of diabetes according to World Health Organization
criteria (i.e., if the 2 hour post-load plasma glucose was at least
200 mg/dl at any survey examination or if found during routine medical
care). The population lives near Phoenix, Arizona, USA.
Results: Their ADAP algorithm makes a real-valued prediction between
0 and 1. This was transformed into a binary decision using a cutoff of
0.448. Using 576 training instances, the sensitivity and specificity
of their algorithm was 76% on the remaining 192 instances.
4. Relevant Information:
Several constraints were placed on the selection of these instances from
a larger database. In particular, all patients here are females at
least 21 years old of Pima Indian heritage. ADAP is an adaptive learning
routine that generates a
1. Number of times pregnant
2. Plasma glucose concentration a 2 hours in an oral glucose tolerance test
3. Diastolic blood pressure (mm Hg)
4. Triceps skin fold thickness (mm)
5. 2-Hour serum insulin (mu U/ml)
6. Body mass index (weight in kg/(height in m)^2)
7. Diabetes pedigree function
8. Age (years)
9. Class variable (0 or 1)nd executes digital analogs of perceptron-like
devices. It is a unique algorithm; see the paper for details.
5. Number of Instances: 768
6. Number of Attributes: 8 plus class
7. For Each Attribute: (all numeric-valued)
8. Missing Attribute Values: Yes
9. Class Distribution: (class value 1 is interpreted as "tested positive for
Class Value Number of instances
0 500
1 268
10. Brief statistical analysis:
Attribute number: Mean: Standard Deviation:
1. 3.8 3.4
2. 120.9 32.0
3. 69.1 19.4
4. 20.5 16.0
5. 79.8 115.2
6. 32.0 7.9
7. 0.5 0.3
8. 33.2 11.8
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