calc_ffm | R Documentation |
Get an estimate of fat-free mass (FFM, in kg) based on weight, height, and sex (and age for Storset equation).
calc_ffm( weight = NULL, bmi = NULL, sex = NULL, height = NULL, age = NULL, method = c("janmahasatian", "green", "al-sallami", "storset", "bucaloiu", "hume", "james", "garrow_webster"), digits = 1 ) ffm_janmahasatian_green(weight, sex, height = NULL, bmi = NULL) ffm_al_sallami(weight, sex, age, height = NULL, bmi = NULL) ffm_storset(weight, sex, height, age) ffm_bucaloiu(weight, sex, height, age) ffm_hume(weight, sex, height) ffm_james(weight, sex, height) ffm_garrow_webster(weight, sex, height)
weight |
total body weight in kg |
bmi |
BMI, only used in 'green' method. If 'weight' and 'height' are both specified, 'bmi' will be calculated on-the-fly. |
sex |
sex, either 'male' of 'female' |
height |
height in cm, only required for 'holford' method, can be used instead of 'bmi' for 'green' method |
age |
age, only used for Storset equation |
method |
estimation method, one of 'janmahasatian' (default), 'green', 'al-sallami', 'storset', 'bucaloiu', 'hume', 'james', or 'garrow_webster'. |
digits |
round to number of digits |
References: 'janmahasatian', 'green': Janmahasatian et al. Clin Pharmacokinet. 2005;44(10):1051-65) 'al-sallami': Al-Sallami et al. Clin Pharmacokinet 2015 'storset': Storset E et al. TDM 2016 'bucaloiu': Bucaloiu ID et al. Int J of Nephrol Renovascular Dis. 2011 (Morbidly obese females) 'hume': Hume R. J Clin Pathol 1966 'james': James WPT et al. Research on obesity: a report of the DHSS/MRC Group 1976 ‘garrow_webster': Garrow JS, Webster J. Quetelet’s index (W/H2) as a measure of fatness. Int J Obesity 1984
Overview: - Sinha J, Duffull1 SB, Al-Sallami HS. Clin Pharmacokinet 2018. https://doi.org/10.1007/s40262-017-0622-5
Returns a list of the following elements:
value |
Fat-free Mass (FFM) in units of kg |
unit |
Unit describing FFM, (kg) |
method |
Method used to calculate FFF |
calc_ffm(weight = 70, bmi = 25, sex = "male") calc_ffm(weight = 70, height = 180, age = 40, sex = "female", method = "storset")
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