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Table 8 Post-test probability of significant symptoms with a positive (LR 1.36) or negative dipstick (LR 0.36) test for leucocyte-esterase [23]

From: Predicting acute uncomplicated urinary tract infection in women: a systematic review of the diagnostic accuracy of symptoms and signs

Symptom

Reference standard

Pre-test probability

(95%CI) (%)

Post-test probability

(95%CI) (LR+)

Post-test probability

(95% CI) (LR-)

Dysuria

102 CFU/ml

71.0 (70.0-71.0)

76.9 (76.0-76.9)

46.8 (45.7-46.8)

 

103 CFU/ml

62.3 (61.0-63.6)

69.2 (68.0-70.4)

37.3 (36.0-38.6)

 

105 CFU/ml

51.1 (49.5-52.8)

58.7 (57.1-60.3)

27.3 (26.1-28.7)

Frequency

102 CFU/ml

67.8 (67.0-68.5)

74.1 (73.4-74.7)

43.1 (42.2-43.9)

 

103 CFU/ml

58.6 (57.5-59.5)

65.8 (64.8-66.6)

33.8 (32.8-34.6)

 

105 CFU/ml

47.8 (46.7-49.0)

55.5 (54.4-56.6)

24.8 (24.0-25.7

Hematuria

102 CFU/ml

75.8 (70.9-80.1)

81.0 (76.8-84.6)

53.0 (46.7-59.2)

 

103 CFU/ml

67.4 (60.6-73.6)

73.8 (67.7-79.1)

42.7 (35.6-50.1)

Nocturia

102 CFU/ml

69.4 (67.3-71.3)

75.5 (73.7-77.2)

44.9 (42.6-47.2)

 

103 CFU/ml

60.8 (58.4-63.3)

67.8 (65.6-70.1)

35.8 (33.6-38.3)

Urgency

102 CFU/ml

69.8 (68.5-71.1)

75.9 (74.7-77.0)

45.4 (43.9-47.0)

 

103 CFU/ml

61.7 (59.9-63.6)

68.7 (67.0-70.4)

36.7 (35.0-38.6)

 

105 CFU/ml

49.1 (47.1-51.1)

56.7 (55.0-58.7)

25.8 (24.3-27.3)

Vaginal discharge

102 CFU/ml

54.1 (48.3 - 59.9)

61.6 (56.0-67.0)

29.8 (25.2-35.0)