Measurement of total body nitrogen: by prompt gamma neutron activation analysis
Subjects: adults (20 to 80 years), including healthy, cancer and obese individuals.
Estimate from Height, Body Weight, Age and Sex
total body nitrogen in grams for males =
= (7.30 * (body height in cm)) + (5.41 * (body weight in kilograms)) – (7.11 * (age in years)) + 423.3
total body nitrogen in grams for females =
= (14.94 * (body height in cm)) - (1.60 * (body weight in kilograms)) – (5.30 * (age in years)) – 785.3
Estimate from Height, Age and Sex
total body nitrogen in grams for males =
= (13.41 * (body height in cm)) – (6.46 * (age in years)) – 251.8
total body nitrogen in grams for females =
= (14.16 * (body height in cm)) – (5.11 * (age in years)) – 756.6
Estimate from Total Body Potassium and Sex
total body nitrogen in grams for males =
= (10.15 * (total body potassium in grams)) + 405.6
total body nitrogen in grams for females =
= (12.95 * (total body potassium in grams)) + 151.7
