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Table 4 Diagnostic performance of 10 scores

From: Validation of scoring systems for the prediction of complicated appendicitis in adults using clinical and computed tomographic findings

 

Modified Atema score

Modified Kim score

Modified Imaoka score

Avanesov score

Khan score

Modified Lin Model 1 score

Modified Lin Model 2 score

KimHY score

Current scorea

Current scoreb

Cutoff values

 ≥ 5

 ≥ 1

 ≥ 1

 ≥ 2

 ≥ 2

 ≥ 4

 ≥ 4

 ≥ 3

 ≥ 2

 ≥ 2

True positive

115

125

101

111

96

111

106

92

112

114

False positive

78

153

83

92

103

105

107

58

101

102

False negative

12

2

26

16

31

16

20

34

15

13

True negative

120

45

115

105

95

93

90

139

97

96

Sensitivity (%)

90.6 (84.1–95.0)

98.4 (94.4–99.8)

79.5 (71.5–81.2)

87.4 (80.3–92.6)

75.6 (67.2–82.8)

87.4 (80.3–92.6)

84.1 (76.6–90.0)

73.0 (64.4–80.5)

88.2 (81.3–93.2)

89.8 (82.1–94.4)

Specificity (%)

60.6 (53.4–67.5)

22.7 (17.1–29.2)

58.1 (50.9–65.0)

52.3 (46.1–60.4)

48.0 (40.8–55.2)

47.0 (39.9–54.2)

45.7 (38.6–52.9)

70.6 (63.7–76.8)

49.0 (41.8–56.2)

48.5 (41.3–55.7)

Positive likelihood ratio

2.30 (1.92–2.76)

1.27 (1.18–1.38)

1.90 (1.58–2.29)

1.87 (1.59–2.20)

1.45 (1.23–1.72)

1.65 (1.42–1.91)

1.55 (1.34–1.80)

2.48 (1.95–3.16)

1.73 (1.49–2.01)

1.74 (1.50–2.02)

Negative likelihood ratio

0.16 (0.09–0.27)

0.07 (0.02–0.28)

0.35 (0.25–0.51)

0.24 (0.15–0.38)

0.51 (0.36–0.71)

0.27 (0.17–0.43)

0.35 (0.23–0.53)

0.38 (0.28–0.52)

0.24 (0.15–0.40)

0.21 (0.12–0.36)

Positive predictive value (%)

59.6 (55.2–63.9)

45.0 (43.0–46.9)

54.9 (50.3–59.4)

54.7 (50.6–58.7)

48.2 (44.1–52.4)

51.4 (47.7–55.0)

49.8 (46.1–53.5)

61.3 (55.5–66.9)

52.6 (48.8–56.3)

52.8 (49.1–56.4)

Negative predictive value (%)

90.9 (85.2–94.6)

95.8 (84.8–98.9)

81.6 (75.5–86.4)

86.8 (80.3–91.4)

75.4 (68.6–81.1)

85.3 (78.2–90.4)

81.8 (74.5–87.4)

80.3 (75.2–84.7)

86.6 (79.8–91.4)

88.1 (81.2–92.6)

Accuracy (%)

72.3 (67.1–77.1)

52.3 (46.7–57.8)

66.5 (61.0–71.6)

66.7 (61.2–71.8)

58.8 (53.2–64.2)

62.8 (57.3–68.0)

60.7 (55.1–66.0)

71.5 (66.3–76.4)

64.3 (58.8–69.5)

64.6 (59.2–69.8)

  1. aUsing odds ratio
  2. bUsing coefficient