Table 3.
Superficial Muscle
SUVpeak |
Deep Muscle
SUVpeak |
All Muscles
SUVpeak |
Descending Aorta
SUVpeak |
|||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
B | R 2 | p | B | R 2 | p | B | R 2 | p | B | R 2 | p | |
Model 1 (unadjusted) | ||||||||||||
IS | 0.03 | −0.013 | 0.85 | 0.27 | −0.002 | 0.37 | 0.16 | −0.004 | 0.41 | −0.56 | 0.030 | 0.07 |
IV | 0.001 | −0.013 | 0.99 | −0.28 | −0.006 | 0.45 | −0.15 | −0.008 | 0.53 | 1.03 | 0.080 | 0.01 |
RA | −0.06 | −0.013 | 0.95 | 2.06 | −0.002 | 0.35 | 1.15 | −0.005 | 0.42 | −1.48 | −0.008 | 0.52 |
TL10 (hh:mm) | 0.003 | −0.011 | 0.67 | 0.01 | 0.005 | 0.25 | 0.01 | 0.005 | 0.25 | −0.003 | −0.013 | 0.84 |
TM5 (hh:mm) | 0.01 | −0.003 | 0.38 | −0.004 | −0.013 | 0.83 | 0.003 | −0.013 | 0.82 | −0.03 | 0.025 | 0.09 |
L10 (°C) | 0.002 | −0.013 | 0.9 | −0.02 | −0.006 | 0.48 | −0.01 | −0.009 | 0.56 | 0 | −0.013 | 1 |
M5 (°C) | 0.005 | −0.013 | 0.84 | 0.02 | −0.011 | 0.65 | 0.02 | −0.010 | 0.64 | −0.07 | 0.005 | 0.25 |
Model 2 (adjusted for sex and personal-ETL10) | ||||||||||||
IS | −0.066 | 0.034 | 0.66 | 0.02 | 0.099 | 0.96 | −0.03 | 0.111 | 0.89 | −0.57 | 0.095 | 0.08 |
IV | 0.13 | 0.038 | 0.49 | 0.04 | 0.099 | 0.92 | 0.10 | 0.113 | 0.69 | 1.09 | 0.136 | 0.01 |
RA | −1.59 | 0.056 | 0.17 | −1.78 | 0.105 | 0.47 | −1.60 | 0.123 | 0.31 | −2.92 | 0.072 | 0.26 |
TL10 (hh:mm) | −0.002 | 0.032 | 0.80 | 0.005 | 0.100 | 0.72 | 0.002 | 0.111 | 0.80 | −0.004 | 0.057 | 0.79 |
TM5 (hh:mm) | 0.01 | 0.042 | 0.37 | −0.01 | 0.101 | 0.70 | 0.001 | 0.111 | 0.95 | −0.03 | 0.085 | 0.13 |
L10 (°C) | 0.02 | 0.058 | 0.15 | 0.03 | 0.109 | 0.37 | 0.03 | 0.127 | 0.25 | 0.04 | 0.071 | 0.29 |
M5 (°C) | 0.01 | 0.032 | 0.80 | 0.03 | 0.101 | 0.64 | 0.01 | 0.112 | 0.71 | −0.005 | 0.056 | 0.94 |
Linear regression analyses were performed to examine the association of the DST variables with 18F-fluorodeoxyglucose (18F-FDG) uptake by the skeletal muscles and the descending aorta. Model 1 was adjusted for no covariate (N = 77); model 2 was adjusted for sex and the mean personal environmental temperature over the L10 period (personal-ETL10, n = 76). Nonstandardized B coefficient, adjusted R2, andp values 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.