I have this original formula from a medical research book:
Log(e) (EFW) = (-4.564+(0.282*AC)-(0.00331*AC^2))*1000
EFW (grams), AC (cm)
this is what i did:
$ac = 291; // (mm)
$w = log(-4.564+(0.282*($ac/10))-(0.00331*pow(($ac/10),2)))*1000);
echo "result: " . $w;
result: 6.7
the result should be between 1900-2500 grams, but not 6.7 grams. I do not have any clue what is wrong here? would you please take a look for me, Thank you!
Edit: I would like to have the result in gramm, and my AC is in mm
Code:
$ac = 291; // (mm)
$w = exp(
-4.564
+(0.282*($ac/10))
-(0.00331*pow(($ac/10),2))
)*1000;
echo "result: " . $w;
Result:
result: 2314.6509531657
Which is between 1900-2500 :)