Association between thermogenic brown fat and genes under positive natural selection in circumpolar populations

Table 1 Characteristics of participants in the FDG-PET/CT population

	All	BAT-positive	BAT-negative	P-value
n (men/women)	399 (343/56)	247 (225/22)	152 (118/34)	< 0.001
Age (years)	27.1 ± 7.6	25.6 ± 6.3	29.6 ± 9.0	< 0.001
Height (cm)	170.5 ± 7.3	171.0 ± 7.2	169.6 ± 7.3	0.759^b
Weight (kg)	63.7 ± 10.5	63.0 ± 9.5	64.8 ± 11.8	0.006^b
BMI (kg/m²)	21.9 ± 2.9	21.5 ± 2.6	22.5 ± 3.2	0.003^b
BFP (%)	19.0 ± 6.4	17.8 ± 5.5	20.8 ± 7.1	0.189^b
SUV_max^a	6.1 ± 6.3	7.9 ± 6.4	0.9 ± 0.4	< 0.001

P-values between BAT-positive and BAT-negative phenotypes were calculated as follows: men-to-women ratio, Pearson’s chi-square test; age and SUV_max, Mann–Whitney U test; other traits, multiple linear regression model adjusted for age and sex. Continuous variables are presented as means ± standard deviation
^aData from 325 participants is shown (BAT-positive: n = 242; BAT-negative: n = 83)
^bP-value shows the effect of BAT-positive or BAT-negative groups
BAT Brown adipose tissue, BFP Body fat percentage, BMI Body mass index, FDG-PET/CT Fluorodeoxyglucose-positron emission tomography and computed tomography, SUV_max Maximum standardized uptake value

ISSN: 1880-6805