Why 72 as a constant in cockcroft gault?

The constant 72 in the Cockcroft-Gault equation is used to convert the product of the serum creatinine level, body weight, and a correction factor into an estimate of the glomerular filtration rate (GFR) in mL/min. This constant helps standardize the formula for adults, allowing for a more straightforward calculation of kidney function. It reflects the units used in the equation, ensuring that the final GFR value is expressed in a clinically relevant format.