Convert Equation Help

ClinMan

I am trying to convert the following equation into a format that uses only addition, multiplication, subtraction and division. This is a formula for calculating glomerular filtration rate, and the archaic programming language my lab system uses does not have any advanced math functions. Help!
Formula is:

186 X (creatinine)-1.154 X (age) -0.0203 X (.742 if female or 1.210 if African-american)

NOTE: items in red are exponents, sample creatinine value is 1.7...

Colonel Sanders

can you use indicator variables for the last part?

a 0 for no and a 1 for yes?

186 x creatine - 1.154 x age - 0.023 x 0.742 x female_indicator -0.023 x 1.210 x african_american_indicator

for a female the inputs would be (creatine, age, 1, 0)

for an african american the inputs would be (creatine, age, 0, 1)

mcyclist

can you use logs?. If not what exactly is the language you are using.

If that doesn't work try Cystatin C. more accurate than creatinine clearence

Sev

You could try taylor expanding Creatine^-1.154 and Age^-0.0203 about 1