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Am Fam Physician. 2005;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.

TestFindingSensitivity (%)*Specificity (%)*
Urinalysis16,17 > 5 WBCs/HPF72 to 9548 to 82
> 10 WBCs/HPF58 to 8265 to 86
Leukocyte esterase test3 Positive74 to 9694 to 98
Nitrite test18 Positive35 to 8592 to 100
Leukocyte esterase and nitrite tests15,19 Either test positive75 to 8482 to 98
Dipstick hematuria20 Positive4488
Gram stain of uncentrifuged urine21 > 1 bacterium per HPF9395

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