Corrections



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Am Fam Physician. 2005 Dec 1;72(11):2182.

The article “Diagnosis and Management of Acute Pyelonephritis in Adults,” (March 1, 2005, page 933) contained an error in Table 3, which discussed the laboratory diagnosis of urinary tract infection. In this table, the sensitivity and specificity for nitrate test were inadvertently transposed, and should have been listed as 35 to 85 percent sensitivity and 92 to 100 percent specificity. The online version of this article has been corrected, and the corrected Table 3 is reprinted below.

TABLE 3

Laboratory Diagnosis of Urinary Tract Infection

Test Finding Sensitivity (%)* Specificity (%)*

Urinalysis16,17

> 5 WBCs/HPF

72 to 95

48 to 82

> 10 WBCs/HPF

58 to 82

65 to 86

Leukocyte esterase test3

Positive

74 to 96

94 to 98

Nitrite test18

Positive

35 to 85

92 to 100

Leukocyte esterase and nitrite tests15,19

Either test positive

75 to 84

82 to 98

Dipstick hematuria20

Positive

44

88

Gram stain of uncentrifuged urine21

> 1 bacterium per HPF

93

95


WBCs/HPF = white blood cells per high-power field.

*—For identification of > 100,000 colony-forming units per mm3.

Information from references3 and15 through21.

TABLE 3   Laboratory Diagnosis of Urinary Tract Infection

View Table

TABLE 3

Laboratory Diagnosis of Urinary Tract Infection

Test Finding Sensitivity (%)* Specificity (%)*

Urinalysis16,17

> 5 WBCs/HPF

72 to 95

48 to 82

> 10 WBCs/HPF

58 to 82

65 to 86

Leukocyte esterase test3

Positive

74 to 96

94 to 98

Nitrite test18

Positive

35 to 85

92 to 100

Leukocyte esterase and nitrite tests15,19

Either test positive

75 to 84

82 to 98

Dipstick hematuria20

Positive

44

88

Gram stain of uncentrifuged urine21

> 1 bacterium per HPF

93

95


WBCs/HPF = white blood cells per high-power field.

*—For identification of > 100,000 colony-forming units per mm3.

Information from references3 and15 through21.



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