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Leonard Leibovici, MD; Gershon Alpert, MD; Arie Laor, MD; Ofra Kalter-Leibovici, MD; Yehuda L. Danon, MD

Arch Intern Med. 1989;149(9):2048-2050.

Abstract
• To develop a clinical model for diagnosis of bacterial urinary tract infection, we conducted a prospective study on 266 dysuric young women, 147 of whom had urinary tract infections. Five variables were found to be significant and independent correlates to bacterial urinary tract infection on logistic regression analysis: sexual activity, absence of vaginal discharge, short duration of complaints, leukocyturia, and hematuria. An algorithm combining the logistic model and a Gram-stained urine specimen, which was used in only a third of our patients, afforded a sensitivity of 86% and a specificity of 84%. The algorithm was validated in a second set of 166 dysuric women, 77 of whom had urinary tract infections. The algorithm led to a diagnosis of bacterial urinary tract infection with a sensitivity of 91% and specificity of 79%; the only laboratory test needed except for urinalysis was a Gram's stain of urine, obtained for 30% of the patients.

(Arch Intern Med. 1989;149:2048-2050)

Author Affiliations
From the Israel Defence Forces Medical Corps (Drs Leibovici, Alpert, Laor, and Danon); the Departments of Internal Medicine (Drs Leibovici and KalterLeibovici) and Pediatrics (Drs Alpert and Danon), Beilinson Medical Center, Petah Tikva, Israel; and the Tel Aviv (Israel) University Sackler School of Medicine (Drs Leibovici, Alpert, Kalter-Leibovici, and Danon). Dr Laor is now with the Department of Internal Medicine, Carmel Hospital, Haifa, Israel. Dr Kalter-Leibovici is now with the Institute of Pediatric Endocrinology, Beilinson Medical Center.

Footnotes
Accepted for publication February 17, 1989.

Read in part at the Fourth International Symposium on Pyelonephritis, Goteborg, Sweden, June 23, 1986.

Reprint requests to Department of Internal Medicine "B," Beilinson Medical Center, Petah Tikva 49 100, Israel (Dr Leibovici).

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