Table 3.

Positive and negative predictive values for PSMA-11 PET/CT(MRI) in 65 patients in relation to PSA level at the time of imaging

	PSA level at the time of SLND (ng/ml)a
	<1.4		≥1.4
	Positive predictive value (95% CI), %	Negative predictive value (95% CI), %	Positive predictive value (95% CI), %	Negative predictive value (95% CI), %
Regional analysis
Pelvic (right)	95 (74.2–99.2)	100	100	85.7 (61.7–95.7)
Pelvic (left)	94.4 (71.8–99.1)	100	100	100
Presacral	100	97 (84.2–99.9)	93.3 (67.5–99)	94.1 (70.6–99)
Retroperitoneal	100	96.7 (84.2–99.4)	100	92.6 (79.5–97.6)
Subregional analysis
Common iliac
Right	50 (7.1–92.9)	90.3 (84.1–94.3)	100	80 (63.1–90.3)
Left	80 (34.5–96.8)	89.3 (77.9–95.2)	100	100
External iliac
Right	100	96.2 (80–99.4)	100	92.6 (79.5–97.6)
Left	85.7 (46.7–97.6)	100	100	96 (79.3–99.3)
Internal iliac
Right	100	96.3 (80.9–99.4)	100	100
Left	100	90.9 (73.7–97.3)	100	95.7 (77.4–99.3)
Obturator
Right	100	96.2 (80–99.4)	100	95.5 (76.4–99.3)
Left	100	96.3 (80.9–99.4)	100	90.9 (73.8–97.3)
External, internal and obturator combined
Right	100	100	100	93.3 (67.6–99)
Left	95 (74.2–9.2)	100	100	100

^a33 patients with a PSA level <1.4 ng/ml, median 0.8 ng/ml (IQR 0.6–1 ng/ml); 32 patients with a PSA level ≥1.4 ng/ml, median 2.9 ng/ml (IQR 2.3–4.2 ng/ml)