# Glomerular Filtration Rate

The special qualifiers GFR (actual body weight) and GFR (ideal body weight) calculate the Glomerular Filtration Rate to 1 decimal place based on the Cockcroft and Gault formula.

For female patients:
``((140 - AGE) X WEIGHT) / SE CREATININE``
For male patients:
``(((140 - AGE) X WEIGHT) / SE CREATININE) x 1.23``
Where:
• AGE is in completed years
• WEIGHT is in kg
• SE CREATININE is in umol/l
For `GFR (actual body weight)`, the actual body weight is used. For ```GFR (ideal body weight)``` the maximum adult lean weight is used if this is lower than the actual body weight. This is calculated as:
``(HEIGHT x HEIGHT) x 25``

Where Height is in m

Communicare requires the qualifiers to use the following units:
• Weight in kg
• Height in cm
• Se Creatinine in either umol/L or mmol/L
Add the GFR (actual body weight) qualifier and the GFR (ideal body weight) qualifier to separate clinical items:
• Add the GFR (actual body weight) qualifier with Weight and Creatinine.
• Add the GFR (ideal body weight) qualifier with Weight, Height and Creatinine.
Tip: If Weight, Height or Creatinine are not provided at the same time, the most recent measure of weight, height or creatinine are used.
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