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Table 6 Results of sensitivity analyses

From: Performance of prediction rules and guidelines in detecting serious bacterial infections among Tanzanian febrile children

Prediction rule/guideline

n/N

%test positive

% sensitivity (95% CI)

% specificity (95% CI)

Likelihood ratio (95% CI)

positive

negative

Derivation age-group only

 Bleeker

88/507

46.5%

72.7 (62.2–81.7)

58.9 (54.1–63.7)

1.77 (1.49–2.10)

0.46 (0.33–0.66)

 Thayyil

124/777

5.4%

11.3 (6.3–18.2)

95.7 (93.9–97.1)

2.63 (1.43–4.86)

0.93 (0.87–0.99)

 Lab Score

88/507

54.2%

58.0 (47.0–68.4)

46.5 (41.7–51.4)

1.08 (0.89–1.32)

0.90 (0.69–1.18)

 Rotterdam fever model

  2.5% risk

161/985

66.50%

77.6 (70.4–83.8)

35.7 (32.4–39.1)

1.21 (1.10–1.33)

0.63 (0.46–0.85)

  5% risk

161/985

55.53%

70.2 (62.5–77.1)

47.3 (43.9–50.8)

1.33 (1.18–1.50)

0.63 (0.49–0.81)

  15% risk

161/985

36.24%

49.7 (41.7–57.7)

66.4 (63.0–69.6)

1.48 (1.23–1.77)

0.76 (0.65–0.89)

 IMCI

154/941

26.1%

31.8 (24.6–39.8)

70.0 (71.8–78.0)

1.27 (0.98–1.65)

0.91 (0.81–1.02)

 iCCM

154/941

25.8%

31.8 (24.6–39.8)

75.3 (72.2–78.3)

1.29 (0.99–1.68)

0.90 (0.81–1.02)

 ALMANACH

154/941

40.5%

64.9 (56.8–72.4)

64.3 (60.8–67.6)

1.82 (1.57–2.11)

0.55 (0.44–0.68)

 NICE

154/941

74.4%

82.5 (75.5–88.1)

27.2 (24.1–30.4)

1.13 (1.04–1.23)

0.64 (0.45–0.93)

 AAEP

122/756

22.5%

58.2 (48.9–67.1)

84.4 (81.3–87.1)

3.73 (2.95–4.72)

0.50 (0.40–0.61)

Patients without pneumonia only

 IMCI

133/974

28.7%

21.8 (15.1–29.8)

70.2 (66.9–73.2)

0.73 (0.52–1.02)

1.11 (1.01–1.23)

 iCCM

133/974

28.4%

21.8 (15.1–29.8)

70.5 (67.3–73.6)

0.74 (0.53–1.04)

1.11 (1.00–1.23)

 ALMANACH

133/974

43.5%

66.9 (58.2–74.8)

60.2 (56.8–63.5)

1.68 (1.45–1.94)

0.55 (0.43–0.70)

 AAEP

133/841

39.9%

62.4 (53.6–70.7)

63.6 (60.3–66.9)

1.72 (1.46–2.01)

0.59 (0.47–0.74)

Patients without UTI only

 Bleeker

67/672

60.2%

70.1 (57.7–80.7)

40.8 (36.9–44.9)

1.19 (1.00–1.40)

0.73 (0.50–1.07)

 Lab Score

67/672

67.9%

68.7 (56.2–79.4)

32.2 (28.5–36.1)

1.01 (0.85–1.20)

0.97(0.67–1.41)

 ALMANACH

107/946

31.8%

48.6 (38.8–58.5)

70.3 (67.1–73.4)

1.64 (1.31–2.04)

0.73 (0.60–0.88)

 AAEP

107/946

39.4%

62.6 (52.7–71.8)

63.5 (60.2–66.8)

1.72 (1.45–2.04)

0.59 (0.46–0.76)

Patients with negative malaria test only

 Bleeker

119/643

60.4%

79.8 (71.5–86.6)

43.9 (39.6–48.3)

1.42 (1.26–1.60)

0.46 (0.32–0.67)

 Thayyil

153/897

24.0%

31.4 (24.1–39.4)

77.6 (74.4–80.5)

1.40 (1.07–1.83)

0.88 (0.79–0.99)

 Lab Score

119/642

65.4%

68.9 (59.8–77.1)

35.4 (31.3–39.6)

1.07 (0.93–1.22)

0.88 (0.66–1.18)

 Rotterdam fever model

  2.5% risk

152/881

62.9%

76.3 (68.7–82.8)

39.9 (36.3–43.6)

1.27 (1.14–1.41)

0.59 (0.44–0.80)

  5% risk

152/881

51.1%

68.4 (60.4–75.7)

52.5 (48.8–56.2)

1.44 (1.26–1.65)

0.60 (0.47–0.77)

  15% risk

152/881

32.1%

48.0 (39.9–56.3)

71.2 (67.8–74.5)

1.67 (1.36–2.04)

0.73 (0.62–0.86)

Patients with fever without source only for scores that were derived in children with fever without source

 Bleeker

73/315

69.8%

80.8 (69.9–89.1)

33.5 (27.6–39.8)

1.21 (1.05–1.40)

0.57 (0.35–0.95)

 Thayyil

77/367

30.8%

27.3 (17.7–38.6)

68.3 (62.6–73.6)

0.86 (0.58–1.28)

1.07 (0.91–1.25)

 Lab Score

73/314

72.2%

71.2 (59.4–81.2)

27.4 (21.9–33.5)

0.98 (0.83–1.16)

1.05 (0.69–1.59)