FDG uptake | PYP uptake | Difference FDG–PYP 95% CI | p value | Ratio FDG/PYP 95% CI | p value | |
---|---|---|---|---|---|---|
(a) | ||||||
Upper limb | ||||||
M. deltoideus dx | 1.11 ± 0.30 | 0.38 ± 0.14 | 0.73 ± 0.19 (0.56–0.90) | < 0.0001 | 2.91 ± 0.48 (2.47–3.35) | < 0.0001 |
M. biceps dx | 1.35 ± 0.41 | 0.37 ± 0.17 | 0.98 ± 0.31 (0.69–1.27) | 0.0002 | 3.65 ± 1.17 (2.56–4.74) | 0.001 |
M. triceps dx | 0.91 ± 0.22 | 0.31 ± 0.12 | 0.60 ± 0.18 (0.43–0.77) | 0.0001 | 2.93 ± 0.91 (2.09–3.77) | 0.001 |
Lower limb | ||||||
M. gluteus maximus dx | 0.77 ± 0.12 | 0.33 ± 0.03 | 0.44 ± 0.11 (0.33–0.54) | < 0.0001 | 2.31 ± 0.32 (2.02–2.60) | < 0.0001 |
M. quadriceps femoris dx | 0.84 ± 0.08 | 0.31 ± 0.03 | 0.53 ± 0.07 (0.47–0.60) | < 0.0001 | 2.74 ± 0.18 (2.57–2.91) | < 0.0001 |
Derived variable | ||||||
Volume-weighted average SUVmean for all upper limb muscles | 1.10 ± 0.17 | 0.36 ± 0.11 | 0.74 ± 0.13 (0.62–0.87) | < 0.0001 | 3.07 ± 0.76 (2.37–3.77) | 0.0004 |
Volume-weighted average SUVmean for all lower limb muscles | 0.80 ± 0.07 | 0.32 ± 0.02 | 0.48 ± 0.07 (0.42–0.54) | < 0.0001 | 2.49 ± 0.23 (2.28–2.71) | < 0.0001 |
Volume-weighted average SUVmean for all muscles | 0.87 ± 0.08 | 0.33 ± 0.03 | 0.54 ± 0.07 (0.47–0.60) | < 0.0001 | 2.62 ± 0.26 (2.38–2.85) | < 0.0001 |
(b) | ||||||
Upper limb | ||||||
M. deltoideus dx | 2.42 ± 0.57 | 0.93 ± 0.30 | 1.49 ± 0.45 (1.08–1.90) | 0.0001 | 2.60 ± 0.65 (2.01–3.20) | 0.0006 |
M. biceps dx | 3.94 ± 3.20 | 1.04 ± 0.50 | 2.90 ± 2.76 (0.34–5.45) | 0.03 | 3.79 ± 1.66 (2.26–5.32) | 0.004 |
M. triceps dx | 1.92 ± 0.51 | 0.78 ± 0.21 | 1.13 ± 0.45 (0.72–1.55) | 0.0005 | 2.45 ± 0.68 (1.82–3.08) | 0.001 |
Lower limb | ||||||
M. gluteus maximus dx | 2.78 ± 2.26 | 1.17 ± 0.26 | 1.61 ± 2.04 (− 0.28–3.50) | 0.08 | 2.38 ± 1.52 (0.97–3.78) | 0.05 |
M. quadriceps femoris dx | 2.34 ± 0.72 | 1.03 ± 0.30 | 1.31 ± 0.59 (0.76–1.85) | 0.001 | 2.26 ± 0.60 (1.71–2.81) | 0.001 |
Derived variable | ||||||
Volume-weighted average SUVmax for all upper limb muscles | 2.51 ± 0.68 | 0.91 ± 0.24 | 1.60 ± 0.61 (1.04–2.17) | 0.0005 | 2.76 ± 0.79 (2.03–3.49) | 0.001 |
Volume-weighted average SUVmax for all lower limb muscles | 2.59 ± 1.58 | 1.12 ± 0.21 | 1.47 ± 1.43 (0.15–2.80) | 0.03 | 2.31 ± 1.13 (1.27–3.36) | 0.02 |
Volume-weighted average SUVmax for all muscles | 2.57 ± 1.34 | 1.07 ± 0.20 | 1.50 ± 1.24 (0.35–2.64) | 0.02 | 2.40 ± 1.05 (1.43–3.37) | 0.01 |