Table 6 Diagnostic performance of NBI for JNET Type 3 lesions before and after the lecture

Sensitivity

62.9 (55.8–69.4)

73.6 (67.0–79.3)⁺⁺

65.0 (58.5–70.8)

77.9 (72.6–82.1)⁺

96.7 (90.8–99.0)

93.3 (86.8–96.9)

Specificity

91.0 (90.1–91.8)

93.1 (92.3–93.8)⁺⁺

95.3 (94.5–96.0)

97.9 (97.3–82.1)⁺

98.8 (98.0–99.0)

98.8 (97.9–99.2)

PPV

46.6 (41.3–51.4)

57.2 (52.1–61.7)⁺⁺

63.2 (56.9–68.9)

82.6 (76.9–87.1)⁺

90.6 (85.1–92.8)

90.3 (84.0–93.8)

NPV

95.1 (94.2–96.0)

96.6 (95.7–97.3)

95.6 (94.8–96.3)

97.3 (96.6–97.8)⁺⁺

99.6 (98.8–99.9)

99,2 (98.3–99.6)

Accuracy

87.9 (86.3–89.3)

91.0 (89.5–92.2)⁺

91.9 (90.5–93.2)

95.7 (94.5–96.7)⁺

98.5 (97.2–99.0)

98.1 (96.7–98.9)

κ-Value

0.031

0.192

0.246

0.268

− 0.0345

− 0.0714