Enter the 24-hour urinary creatinine and expected 24-hour urinary creatinine into the calculator to determine the Creatinine Height Index. This calculator can also evaluate any of the variables given the others are known.

Creatinine Height Index Formula

The following formula is used to calculate the Creatinine Height Index (CHI).

CHI = (24-hour urinary creatinine / expected 24-hour urinary creatinine) * 100Variables:

  • CHI is the Creatinine Height Index (%)
  • 24-hour urinary creatinine is the amount of creatinine excreted in urine over 24 hours (mg/day)
  • Expected 24-hour urinary creatinine is the expected amount of creatinine that should be excreted in urine over 24 hours based on the person’s height and gender (mg/day)

To calculate the Creatinine Height Index, divide the 24-hour urinary creatinine by the expected 24-hour urinary creatinine. Multiply the result by 100 to get the Creatinine Height Index in percentage. This index is used to assess the nutritional status of individuals, especially those with kidney diseases.

What is a Creatinine Height Index?

The Creatinine Height Index (CHI) is a measure used to assess the muscle mass in individuals, particularly in those with kidney disease. It is calculated by comparing the amount of creatinine (a waste product produced by muscles) excreted in urine over 24 hours to the expected creatinine excretion for a healthy individual of the same height. A lower CHI indicates a loss of muscle mass, which can be a sign of malnutrition or other health issues.

How to Calculate Creatinine Height Index?

The following steps outline how to calculate the Creatinine Height Index (CHI).

  1. First, determine the 24-hour urinary creatinine (mg/day).
  2. Next, determine the expected 24-hour urinary creatinine (mg/day) based on the person’s height and gender.
  3. Next, gather the formula from above = CHI = (24-hour urinary creatinine / expected 24-hour urinary creatinine) * 100.
  4. Finally, calculate the Creatinine Height Index.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

24-hour urinary creatinine (mg/day) = 150

Expected 24-hour urinary creatinine (mg/day) = 120