Title: Does urine concentration effect the diagnosis of urinary tract infection?<br/>Author: Jenny Guyther<br/><a href='http://umem.org/profiles/faculty/314/'>[Click to email author]</a><hr/><div>
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<span style="font-size:12px;"><span style="font-family: arial, sans-serif;">A recent study suggests that using a lower cut off value of white blood cells in dilute urine, may have a higher likelihood of detecting a urinary tract infection in children.</span></span></p>
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<span style="font-size:12px;">In dilute urine (specific gravity < 1.015), the optimal white blood cell cut off point was 3 WBC/hpf (Positive LR 9.9). With higher specific gravities, the optimal cut off was 6 WBC/hpf (Positive LR 10). Positive leukocyte esterase has a high likelihood ratio regardless of the urine concentration. </span></p>
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