|
Feature name
|
Type
|
Description and
values
|
|
Encounter
ID
|
Numeric
|
Unique
identifier of an encounter
|
|
Patient
number
|
Numeric
|
Unique
identifier of a patient
|
|
Race
|
Nominal
|
Values:
Caucasian, Asian, African American, Hispanic, and other
|
|
Gender
|
Nominal
|
Values:
male, female, and unknown/invalid
|
|
Age
|
Nominal
|
Grouped
in 10-year intervals: 0, 10), 10, 20), …, 90, 100)
|
|
Weight
|
Numeric
|
Weight
in pounds.
|
|
Admission
type
|
Nominal
|
Integer
identifier corresponding to 9 distinct values, for example, emergency,
urgent, elective, newborn, and not available
|
|
Discharge
disposition
|
Nominal
|
Integer
identifier corresponding to 29 distinct values, for example, discharged to
home, expired, and not available
|
|
Admission
source
|
Nominal
|
Integer
identifier corresponding to 21 distinct values, for example, physician
referral, emergency room, and transfer from a hospital
|
|
Time
in hospital
|
Numeric
|
Integer
number of days between admission and discharge
|
|
Payer
code
|
Nominal
|
Integer
identifier corresponding to 23 distinct values, for example, Blue Cross/Blue Shield,
Medicare, and self-pay
|
|
Medical
specialty
|
Nominal
|
Integer
identifier of a specialty of the admitting physician, corresponding to 84
distinct values, for example, cardiology, internal medicine, family/general practice,
and surgeon
|
|
Number
of lab procedures
|
Numeric
|
Number
of lab tests performed during the encounter
|
|
Number
of procedures
|
Numeric
|
Number
of procedures (other than lab tests) performed during the encounter
|
|
Number
of medications
|
Numeric
|
Number
of distinct generic names administered during the encounter
|
|
Number
of outpatient visits
|
Numeric
|
Number
of outpatient visits of the patient in the year preceding the encounter
|
|
Number
of emergency visits
|
Numeric
|
Number
of emergency visits of the patient in the year preceding the encounter
|
|
Number
of inpatient visits
|
Numeric
|
Number
of inpatient visits of the patient in the year preceding the encounter
|
|
Diagnosis
1
|
Nominal
|
The
primary diagnosis (coded as first three digits of ICD9); 848 distinct
values
|
|
Diagnosis
2
|
Nominal
|
Secondary
diagnosis (coded as first three digits of ICD9); 923 distinct values
|
|
Diagnosis
3
|
Nominal
|
Additional
secondary diagnosis (coded as first three digits of ICD9); 954 distinct
values
|
|
Number
of diagnoses
|
Numeric
|
Number
of diagnoses entered to the system
|
|
Glucose
serum test result
|
Nominal
|
Indicates
the range of the result or if the test was not taken. Values: “>200,”
“>300,” “normal,” and “none” if not measured
|
|
A1c
test result
|
Nominal
|
Indicates
the range of the result or if the test was not taken. Values: “>8” if
the result was greater than 8%, “>7” if the result was greater than 7%
but less than 8%, “normal” if the result was less than 7%, and “none” if
not measured.
|
|
Change
of medications
|
Nominal
|
Indicates
if there was a change in diabetic medications (either dosage or generic
name). Values: “change” and “no change”
|
|
Diabetes
medications
|
Nominal
|
Indicates
if there was any diabetic medication prescribed. Values: “yes” and “no”
|
|
24
features for medications
|
Nominal
|
For
the generic names: metformin, repaglinide, nateglinide, chlorpropamide,
glimepiride, acetohexamide, glipizide, glyburide, tolbutamide,
pioglitazone, rosiglitazone, acarbose, miglitol, troglitazone, tolazamide,
examide, sitagliptin, insulin, glyburide-metformin, glipizide-metformin,
glimepiride-pioglitazone, metformin-rosiglitazone, and
metformin-pioglitazone, the feature indicates whether the drug was
prescribed or there was a change in the dosage. Values: “up” if the dosage
was increased during the encounter, “down” if the dosage was decreased,
“steady” if the dosage did not change, and “no” if the drug was not
prescribed
|
|
Readmitted
|
Nominal
|
Days
to inpatient readmission. Values: “<30” if the patient was readmitted in
less than 30 days, “>30” if the patient was readmitted in more than 30
days, and “No” for no record of readmission.
|
