Table 1 Specificity and sensitivity of different cut-off scores on the BDI with ICD-10 clinical diagnosis as gold standard.

≥ 1

100.0 (71.3–100.0)

3.5 (1.3–7.5)

≥ 19

54.5 (23.5–83.1

83.5 (77.1–88.8)

≥ 2

90.9 (58.7–98.5)

4.7 (2.1–9.1)

≥ 20

36.4 (11.2–69.1

84.7 (78.4–89.8)

≥ 3

90.9 (58.7–98.5)

7.1 (3.7–12.0)

≥ 21

36.4 (11.2–69.1)

88.8 (83.1–93.1)

≥ 4

90.9 (58.7–98.5)

11.2 (6.9–16.9)

≥ 22

27.3 (6.3–60.9)

90.0 (84.5–94.1)

≥ 5

90.9 (58.7–98.5)

17.6 (12.2–24.2)

≥ 24

27.3 (6.3–60.9)

90.6 (85.2–94.5)

≥ 6

81.8 (48.2–97.2

22.9 (16.9–30.0)

≥ 25

27.3 (6.3–60.9)

91.2 (85.9–95.0)

≥ 7

81.8 (48.2–97.2

28.8 (22.1–36.3)

≥ 26

27.3 (6.3–60.9)

92.9 (88.0–96.3)

≥ 8

72.7 (39.1–93.7

34.7 (27.6–42.4)

≥ 27

27.3 (6.3–60.9)

94.7 (90.2–97.5)

≥ 9

72.7 (39.1–93.7

37.6 (30.3–45.4)

≥ 28

27.3 (6.3–60.9)

95.3 (90.9–97.9)

≥ 10

72.7 (39.1–93.7)

40.6 (33.1–48.4)

≥ 29

18.2 (2.8–51.8)

95.9 (91.7–98.3)

≥ 11

63.6 (30.9–88.8)

45.9 (38.2–53.7)

≥ 30

18.2 (2.8–51.8)

95.9 (91.7–98.3)

≥ 12

63.6 (30.9–88.8)

52.4 (44.6–60.1)

≥ 32

18.2 (2.8–51.8)

97.6 (94.1–99.3)

≥ 13

63.6 (30.9–88.8)

55.3 (47.5–62.9)

≥ 33

18.2 (2.8–51.8)

98.8 (95.8–99.8)

≥ 14

63.6 (30.9–88.8)

61.2 (53.4–68.5)

≥ 34

18.2 (2.8–51.8

99.4 (96.8–99.9)

≥ 15

63.6 (30.9–88.8)

66.5 (58.8–73.5)

≥ 37

18.2 (2.8–51.8

100.0 (97.8–100.0)

≥ 16

63.6 (30.9–88.8)

70.6 (63.1–77.3)

≥ 40

9.1 (1.5–41.3

100.0 (97.8–100.0)

≥ 17

63.6 (30.9–88.8)

73.5 (66.2–80.0)

≥ 42

0.0 (0.0–28.7)

100.0 (97.8–100.0)

≥ 18

54.5 (23.5–83.1)

76.5 (69.4–82.6)