Body mass index (BMI)
Name bmi
Chapter Endocrine, nutritional, metabolic/Obesity
Definition
Body mass index, calculated as weight in kilograms divided by the square of height

in metres.
Data Type Continuous
Data sources GPRD
Repeated Yes
Units kg / m^2
Range (min/max) height 0.8-2.5m weight 10-500Kg BMI 10-80 kg / m^2-
Valid event date range 01/01/1900 - 25/03/2010
Agreed 02.03.2011 (Revision 1)
Implementation
Apply out-of-range filter first.

If enttype = 13 and data3 not missing, BMI = data3

If enttype = 13 and data3 missing, BMI = data1 (enttype 13) /(data2 ^2) (enttype 14)

IF height not available on same eventdate as weight, use most recent height, from a
Codelist version
Codelist authors
Creation date
Category (code) Clinical code Clinical term Datasource lookup
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