Ankle vibration sense
Name gprd_ankle_vibr
Chapter Diseases of the nervous system/Diabetic neuropathy
Definition
Composite variable, combining results of vibration sense at both ankles. This variable is defined on a per-event basis; only events with entity type 59 are used. Categories are ordered increasing in severity, unlike the original PRE picklist.
Data Type Categorical
Data sources GPRD
Repeated Yes
Valid event date range 01/01/1900 - 25/03/2010
Agreed 17/09/2012 (Revision 1)
Category Definition
0 Data Not Entered
1 Normal
2 Diminished in at least one ankle
3 Absent in one ankle
4 Absent in both ankles
Implementation
IF gprd_la_vibr = 2 AND gprd_ra_vibr = 2 THEN gprd_ankle_vibr = 4

ELSE IF gprd_la_vibr = 2 OR gprd_ra_vibr = 2 THEN gprd_ankle_vibr = 3

ELSE IF gprd_la_vibr = 3 OR gprd_ra_vibr = 3 THEN gprd_ankle_vibr = 2

ELSE IF gprd_la_vibr = 1 AND gprd_ra_vibr = 1
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Category (code) Clinical code Clinical term Datasource lookup
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