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Table 6 Post-test probability of significant symptoms across three different reference standards 102, 103 and 105 CFU/ml

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

Symptom

Reference standard*

+LR (95%CI)

Post-test probability

(95%CI) (%)

Dysuria

102 CFU/ml

1.30 (1.20-1.41)

71.0 (70.0-71.0)

 

103 CFU/ml

1.31 (1.18-1.45)

62.3 (61.0-63.6)

 

105 CFU/ml

1.22 (1.11-1.34)

51.1 (49.5-52.8)

Frequency

102 CFU/ml

1.10 (1.04-1.16)

67.8 (67.0-68.5)

 

103 CFU/ml

1.12 (1.03-1.19)

58.6 (57.5-59.5)

 

105 CFU/ml

1.09 (1.02-1.16)

47.8 (46.7-49.0)

Hematuria

102 CFU/ml

1.72 (1.30-2.27)

75.8 (70.9-80.1)

 

103 CFU/ml

1.68 (1.06-2.66)

67.4 (60.6-73.6)

Nocturia

102 CFU/ml

1.30 (1.08-1.56)

69.4 (67.3-71.3)

 

103 CFU/ml

1.37 (1.13-1.65)

60.8 (58.4-63.3)

Urgency

102 CFU/ml

1.22 (1.11-1.34)

69.8 (68.5-71.1)

 

103 CFU/ml

1.28 (1.11-1.47)

61.7 (59.9-63.6)

 

105 CFU/ml

1.17 (1.04-1.34)

49.1 (47.1-51.1)

Vaginal discharge

102 CFU/ml

0.65(0.51-0.83)

54.1 (48.3 - 59.9)

  1. * Pretest probability is 65.1% at ≥ 102 CFU/ml; 55.4% at ≥ 103 CFU/ml and 44.8% at ≥ 105 CFU/ml