brownfat {gamlss.data} | R Documentation |
The brown fat data set
Description
Brown fat (or brown adipose tissue) is found in hibernating mammals, its function being to increase tolerance to the cold. It is also present in newborn humans. In adult humans it is more rare and is known to vary considerably with ambient temperature. RouthierLabadie2011 analysed data on 4,842 subjects over the period 2007-2008, of whom 328 (6.8%) had brown fat. Brown fat mass and other demographic and clinical variables were recorded. The purpose of the study was to investigate the factors associated with brown fat occurrence and mass in humans.
Usage
data("brownfat")
Format
A data frame with 4842 observations on the following 14 variables.
sex
1=female, 2=male
diabetes
0=no, 1=yes
age
age in years
day
day of observation (1=1 January, ..., 365=31 December)
exttemp
external temperature (degrees Centigrade)
season
Spring=1, Summer=2, Autumn=3, Winter=4
weight
weight in kg
height
height in cm
BMI
body mass index
glycemy
glycemia (mmol/L)
LBW
lean body weight
cancerstatus
0=no, 1=yes, 99=missing
brownfat
presence of brown fat (0=no, 1=yes)
bfmass
brown fat mass (g) (zero if
brownfat
=0)
Source
Determinants of the Presence and Volume of Brown Fat in Humans (2011), Statistical Society of Canada, https://ssc.ca/en/case-study/determinants-presence-and-volume-brown-fat-human, , Accessed 13 February 2019,
References
Ouellet, V., Routhier-Labadie, A., Bellemare, W., Lakhal-Chaieb, L., Turcotte, E., Carpentier, A.C. and Richard, D., (2011). Outdoor temperature, age, sex, body mass index, and diabetic status determine the prevalence, mass, and glucose-uptake activity of 18F-FDG-detected BAT in humans. The Journal of Clinical Endocrinology & Metabolism, 96(1), pp.192-199.
Examples
data(brownfat)