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Table 2 Diagnostic efficacy of PET/CT in the 1764 joints analyzed. Values are expressed in percent with 95% confidence interval. The item “swollen” includes “swollen only” and “tender and swollen”. The item “tender” includes “tender only” and “tender and swollen”. The item “tender or swollen” includes “tender only”, “swollen only” and “tender and swollen”. The item “tender and swollen” includes only a joint that is simultaneously tender and swollen”

From: Dissociation between 2-[18F]fluoro-2-deoxy-D-glucose positron emission computed tomography, ultrasound and clinical assessments in patients with non-severe rheumatoid arthritis, including remission

  Tender Swollen Tender or Swollen Tender and swollen
Sensitivity 40.5 (35.5–45.5) 40.9 (34.7–47.1) 35.8 (31.5–40.1) 58.9 (50.4–67.4)
Specificity 84.9 (83.0–86.8) 82.8 (80.9–84.7) 85.4 (83.4–87.3) 82.6 (80.7–84.4)
Positive predictive value 41.8 (36.7–46.9) 27.4 (22.8–32.0) 48.2 (43.0–53.4) 21.1 (16.8–25.3)
Negative predictive value 84.2 (82.3–86.1) 89.8 (88.2–91.4) 77.8 (75.6–79.9) 96.2 (95.2–97.2)