The Combination of 18F-Fluorodeoxyglucose Positron Emission Tomography Metabolic and Clinical Parameters Can Effectively Distinguish Rheumatoid Arthritis and Polymyalgia Rheumatic
Table 2
The SUVmax and qualitative scores (mean reference score compared to normal liver and mean reference score compared to the control group) for cases compared with controls at each musculoskeletal site.
Musculoskeletal site
RA
PMR
P value
SUVmax
Acromioclavicular joint
2.1 ± 1.3
2.3 ± 1.1
0.180
Shoulder
2.7 ± 1.4
3.9 ± 2.5
0.076
Sternoclavicular joint
2.3 ± 1.6
2.2 ± 0.9
0.489
Interspinous ligament
1.8 ± 0.8
2.8 ± 1.2
0.001
Sacroiliac joint
1.8 ± 0.5
2.3 ± 0.9
0.010
Hip joint
1.8 ± 0.6
2.8 ± 2.0
0.040
Trochanter
1.8 ± 0.8
2.3 ± 0.9
0.006
Symphysis pubis
2.2 ± 2.3
2.1 ± 0.9
0.080
Ischial tubercle
1.6 ± 0.9
2.5 ± 1.2
0.002
Mean ref. (liver) score cases
Acromioclavicular joint
1.4 ± 1.2
1.4 ± 1.0
0.902
Shoulder
2.1 ± 1.0
2.0 ± 1.0
0.804
Sternoclavicular joint
1.7 ± 0.9
1.4 ± 0.9
0.445
Interspinous ligament
1.4 ± 0.7
1.8 ± 1.0
0.092
Sacroiliac joint
1.4 ± 0.7
1.6 ± 0.8
0.339
Hip joint
1.4 ± 0.9
1.6 ± 1.0
0.508
Trochanter
1.3 ± 0.9
1.6 ± 1.0
0.166
Symphysis pubis
1.2 ± 0.8
1.4 ± 0.8
0.313
Ischial tubercle
1.0 ± 1.0
1.7 ± 1.0
0.024
Mean ref. (control) score cases
Acromioclavicular joint
0.9 ± 1.0
1.3 ± 0.9
0.158
Shoulder
1.1 ± 1.0
1.5 ± 0.9
0.117
Sternoclavicular joint
1.2 ± 0.9
1.5 ± 0.9
0.134
Interspinous ligament
0.8 ± 1.0
1.6 ± 0.8
0.003
Sacroiliac joint
0.8 ± 1.0
1.4 ± 0.9
0.037
Hip joint
1.3 ± 1.0
1.6 ± 0.8
0.221
Trochanter
0.5 ± 0.8
1.1 ± 1.0
0.020
Symphysis pubis
1.2 ± 1.0
1.7 ± 0.6
0.038
Ischial tubercle
0.8 ± 1.0
1.6 ± 0.8
0.003
RA: rheumatoid arthritis; PMR: polymyalgia rheumatic; SUV max: maximum standardized uptake value. The significance of bold values is P < 0.05, which means differences were considered statistically significant.
