RAPHAEL B. STRICKER, M.D.
To the editor: Strom and colleagues (1) suggest an association between sexual activity and urinary tract infections in women. However, there appears to be a significant flaw in the study design. The patients were women with urinary tract infections, whereas the controls were women with other acute medical problems, primarily upper respiratory infections. Sexual activity was analyzed as a variable. Because the presence of an upper respiratory infection should exert a negative effect on sexual activity (at least in my experience), the control group appears to be biased against this variable. This bias raises doubts about the study's conclusion.
STRICKER RB. Sexual Activity and Urinary Tract Infections in Women. Ann Intern Med. 1988;108:773–774. doi: 10.7326/0003-4819-108-5-773_2
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Published: Ann Intern Med. 1988;108(5):773-774.
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