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”
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) |