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Clinical prediction guide
A dipstick clinical prediction rule modestly improved diagnostic precision in women with suspected urinary tract infection
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In women with suspected urinary tract infection (UTI), do clinical prediction rules based on clinical information or dipstick results improve diagnostic precision?
2 prospective cohort studies to derive and validate 2 clinical prediction rules.
67 primary care practices in the south of England, UK.
408 women in the derivation cohort and 434 women in the validation cohort who were 17–70 years of age and had suspected UTI. Exclusion criteria were pregnancy, severe mental problems, and high probability of an alternate diagnosis.
dipstick rule: a positive test was the presence of either (i) nitrite or (ii) the combination of blood and leucocytes. Clinical rule: a positive test was the presence of 
2 of cloudy urine, urine with an offensive smell, moderately bad dysuria, and moderately bad nocturia.
UTI, determined by evidence of bacterial growth (using European urinalysis guidelines, 103 colony-forming units/ml for Escherichia coli) on
University of Otago, Christchurch, New Zealand
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Urinary tract infections
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Vulvovaginal disorders
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Urinary tract infections
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Clinical diagnostic tests
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General practice / family medicine
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