Table 1.

Performance characteristics per patient and per polyp

Analysis according to patient (with polyps ≥6 mm)	Sensitivity	Specificity
	(% [95 % CI])
Radiographer R1	76.2 [54.9–89.4]	81.8 [70.9–89.3]
Radiographer R2	71.4 [50.0–86.2]	83.3 [72.6–90.4]
Radiographer R3	85.7 [65.4–95.0]	81.8 [70.9–89.3]
Radiographer R4	71.4 [50.0–86.2]	78.8 [67.5–86.9]
Radiologist R5	66.7 [45.4–82.8]	87.9 [77.9–93.7]
Radiologist R6	85.7 [65.4–95.0]	74.2 [62.6–83.3]
Average reader values
Radiographers	76.2 [61.4–91.0]	81.4 [73.7–89.2]
Radiologists	76.2 [61.7–90.6]	81.1 [73.8–88.3]
Analysis according to polyp	Sensitivity
Size category	≥6 mm	≥10 mm
Radiographer R1	53.8 [39.9–67.8]	50.0 [27.3–72.7]
Radiographer R2	56.4 [40.3–72.5]	61.5 [37.4–85.7]
Radiographer R3	71.8 [61.2–82.4]	60.0 [38.8–81.2]
Radiographer R4	59.0 [44.3–73.6]	71.4 [50.1–92.8]
Radiologist R5	51.3 [36.7–65.9]	66.7 [45.3–88.0]
Radiologist R6	67.6 [48.9–86.3]	71.4 [43.4–99.4]
Average reader values
Radiographers	60.3 [50.3–70.3]	60.7 [42.2–79.2]
Radiologists	59.2 [46.4–72.0]	69.0 [48.1–89.6]