diff --git a/docs/miscellaneous/cockcroft-gault-eq.md b/docs/miscellaneous/cockcroft-gault-eq.md
index b77f924..6ed6a66 100644
--- a/docs/miscellaneous/cockcroft-gault-eq.md
+++ b/docs/miscellaneous/cockcroft-gault-eq.md
@@ -16,7 +16,7 @@
 ### Formula
 #### It uses the following formula to calculate the GFR
 $$
-GFR = \frac{(140 - Age)}{(72 \times Creatinine)} \times 0.85 \text{(if patient is female)}
+GFR = \frac{(140 - Age)}{(72 \times S. Creatinine)} \times 0.85 \text{(if patient is female)}
 $$
 
 ## Interpretation