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. Author manuscript; available in PMC: 2012 May 28.
Published in final edited form as: Clin Transl Sci. 2011 Oct;4(5):338–345. doi: 10.1111/j.1752-8062.2011.00353.x

Urinary tract infections

Organism of interest1 Any organism
Case Case
Positive urine culture with an organism of interest, that is, ≥105 colony forming units per mL of urine and no more than one other species of microorganism OR Positive urine culture with an organism of interest, that is, 103–105 colony forming units per mL of urine and no more than one other species of microorganism and pyuria (≥ 3 white blood cells per high power field in urine microscopy) within ±48 hours of positive culture Positive urine culture with any organism, that is, ≥105 colony forming units per mL of urine and no more than one other species of microorganism OR Positive urine culture with any organism, that is, 103–105 colony forming units per mL of urine and no more than one other species of microorganism and pyuria (≥ 3 white blood cells per high power field in urine microscopy) within ±48 hours of positive culture
Control Control
No positive urine culture with any organism AND No physician diagnosis of a urinary tract infection (ICD-9-CM coding) No positive urine culture with any organism AND No physician diagnosis of a urinary tract infection (ICD-9-CM coding)
Noncase, Noncontrol Noncase, Noncontrol
Positive urine culture with an organism not of interest OR ICD-9-CM code for UTI + NO positive urine culture with any organism ICD-9-CM code for UTI and no positive urine culture with any organism