Table 2.
BAT Volume (mL) |
BAT SUVmean |
BAT SUVpeak |
|||||||
---|---|---|---|---|---|---|---|---|---|
B | R 2 | p | B | R 2 | p | B | R 2 | p | |
Model 1 (adjusted for sex) | |||||||||
IS | 123.12 | 0.068 | 0.03 | 3.13 | 0.021 | 0.07 | 15.75 | 0.029 | 0.04 |
IV | −134.37 | 0.049 | 0.07 | −3.63 | 0.011 | 0.12 | −24.40 | 0.05 | 0.02 |
RA | 1185.52 | 0.119 | 0.03 | 36.59 | 0.092 | 0.003 | 188.62 | 0.127 | 0.001 |
TL10 (hh:mm) | 7.50 | 0.132 | 0.002 | 0.166 | 0.043 | 0.03 | 0.884 | 0.068 | 0.01 |
TM5 (hh:mm) | 1.68 | 0.008 | 0.65 | −0.124 | −0.006 | 0.28 | −0.29 | −0.021 | 0.57 |
L10 (°C) | −18.11 | 0.121 | 0.003 | −0.49 | 0.067 | 0.01 | −2.81 | 0.121 | 0.001 |
M5 (°C) | 0.129 | 0.005 | 0.99 | 0.23 | −0.017 | 0.53 | 0.169 | −0.025 | 0.92 |
Model 2 (adjusted for sex and personal-ETL10) | |||||||||
IS | 295.79 | 0.281 | 0.34 | 0.75 | 0.236 | 0.65 | 4.56 | 0.270 | 0.52 |
IV | −16.33 | 0.272 | 0.81 | −0.09 | 0.234 | 0.96 | −8.38 | 0.273 | 0.37 |
RA | 323.14 | 0.278 | 0.42 | 10.76 | 0.241 | 0.40 | 70.46 | 0.282 | 0.20 |
TL10 (hh:mm) | 4.26 | 0.306 | 0.06 | 0.07 | 0.244 | 0.32 | 0.43 | 0.284 | 0.18 |
TM5 (hh:mm) | −1.64 | 0.274 | 0.65 | −0.23 | 0.277 | 0.04 | −0.77 | 0.290 | 0.12 |
L10 (°C) | −5.94 | 0.282 | 0.32 | −0.12 | 0.238 | 0.52 | −1.16 | 0.285 | 0.16 |
M5 (°C) | −2.92 | 0.273 | 0.77 | 0.10 | 0.235 | 0.75 | −0.40 | 0.266 | 0.77 |
Linear regression analyses were performed to examine the association between DST variables and BAT 18F-fluorodeoxyglucose uptake. Model 1 was adjusted for sex (N = 77) and model 2 for sex and the mean personal environmental temperature over the L10 period (personal-ETL10, n = 76). The nonstandardized B coefficient, adjusted R2, and p value are provided. Significant values are shown in bold (p ≤ 0.05). IS = interday stability; IV = intraday variability; L10 = mean of the 10 consecutive hours with the lowest values and when they occurred (TL10); M5 = mean of the 5 consecutive hours with the highest values and when they occurred (TM5); RA = relative amplitude.