Based on the published data reviewed herein, calculations have been made to determine the sensitivity of a single carefully collected midstream specimen of urine (MSU) in predicting the development of urinary tract infection (UTI) in later pregnancy. These calculations were then repeated using various figures for the accuracy of the initial MSU in detecting bacteriuria, for the proportion of individuals with bacteriuria who develop UTI during pregnancy and for the proportion of those without bacteriuria who do so. The results indicate that under normal circumstances, there is no justification for the suggestion that the results of a single MSU can be used as a predictor of subsequent UTI in that pregnancy.
Lawson DH, Miller AWF. Screening for Bacteriuria in Pregnancy: A Critical Reappraisal. Arch Intern Med. 1973;132(6):904–908. doi:10.1001/archinte.1973.03650120102019
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