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Objective: To compare the childhood urinary tract infection (UTI) guidelines from the Royal College of Physicians (RCP) in 1991 and from National Institute of Health and Care Excellence (NICE) (CG54) in 2007 by measuring their efficiency at detecting urinary tract abnormalities. Design: Children with UTIs within the Newcastle Primary Care Trust ( population 70 800 children) were referred and imaged according to the RCP guidelines during 2008, and these were compared to the activity that would have been undertaken if we had implemented the CG54 guidelines, including following them through 2011 to identify those with recurrent UTIs. Main outcome measures: The numbers of children imaged, the imaging burden and efficiency, and urinary tract abnormalities detected by each guideline. Results: Fewer children would have been imaged by CG54 than RCP (150 vs 427), but its sensitivity was lower, at 44% for detecting scarring, 10% for identifying vesicoureteric reflux and 40% for other abnormalities. Overall, it would have only detected onequarter of the abnormal cases (8 vs 32) and would have missed five of nine children with scarring, including three with multiple lesions and one with renal impairment. Imposing an age restriction of <8 years to the RCP guidelines would reduce its screening rate by 20% and still detect 90% of the abnormalities. Interpretation: The CG54 guidelines do not alter the imaging efficiency compared to the RCP guidelines, but they are considerably less sensitive. [ABSTRACT FROM AUTHOR]

Objective: To test whether active management of urinary tract infections (UTI) in young children by general practitioners can reduce kidney scarring rates. Design: A comparison of two audits in Newcastle, of children aged <8 years, presenting with UTIs ; a retrospective audit of conventional management during 1992-1995 (1990s) versus a prospective audit of direct access management during 2004-2011 (2000s). Main outcome measures: Kidney scarring rates, and their relationship with time-to-treat. Results: Children with a first UTI in the 2000s compared to those in the 1990s, were referred younger, were half as likely to have a renal scar (girls OR 0.47, 95% CI 0.29 to 0.76; boys 0.35, 0.16 to 0.81), and were about 12 times more likely to have vesicoureteric reflux without scarring (girls 11.9, 4.3 to 33.5; boys 14.4, 4.3 to 47.6). In the 2000s, general practitioners treated about half the children at first consultation. Children who were treated within 3 days of their symptoms starting were one-third as likely to scar as those whose symptoms lasted longer (0.33, 0.12 to 0.72). Interpretation: Most kidney defects seen in children after UTIs, are acquired scars, and in Newcastle, active management in primary care has halved this rate. [ABSTRACT FROM AUTHOR]