BMI and BSA are calculated for a data frame that minimally has columns of
HTCM and WTKG. Output columns match the definitions given by sim_kid().
calc_bmi_bsa(data = NULL)A data frame with columns of BMI, BSA1, BSA2, and BSA3 added
to data:
BMI: Body mass index in kilograms per meter squared, rounded to 1
decimal place.
BSA1: Body surface area in meters squared, rounded to 2 decimal
places; calculated using the Mosteller equation.
BSA2: Body surface area in meters squared, rounded to 2 decimal
places; calculated using the Gehan and George equation.
BSA3: Body surface area in meters squared, rounded to 2 decimal
places; calculated using the DuBois equation.
Equations and methods involved during the creation of virtual subjects.
The equation for body mass index in kilograms per meter squared is
BMI = WTKG/((HTCM/100)^2).
The Mosteller equation (1) for body surface area in meters squared is
BSA1 = sqrt(WTKG*HTCM/3600).
The Gehan and George equation (2) for body surface area in meters squared is
BSA2 = 0.0235*(WTKG^0.51456)*(HTCM^0.42246).
The DuBois equation (3) for body surface area in meters squared is
BSA3 = 0.007184*(WTKG^0.425)*(HTCM^0.725).
(1) Mosteller RD. Simplified calculation of body-surface area. N Engl J Med. 1987 Oct 22;317(17):1098. <doi: 10.1056/NEJM198710223171717.> PMID: 3657876. (2) Gehan EA, George SL. Estimation of human body surface area from height and weight. Cancer Chemother Rep. 1970 Aug;54(4):225-35. PMID: 5527019. (3) Du Bois D, Du Bois EF. A formula to estimate the approximate surface area if height and weight be known. 1916. Nutrition. 1989 Sep-Oct;5(5):303-11; discussion 312-3. PMID: 2520314.
demo0 <- sim_kid()
demo <- calc_bmi_bsa(data = demo0)