Prospective evaluation of routine admission urinalyses

Area of Science:

• Pediatric Nephrology
• Clinical Diagnostics
• Healthcare Management

Background:

• Dipstick urinalysis is a common screening tool in pediatric hospital admissions.
• Initial screening may yield high rates of abnormalities due to false positives.
• The clinical utility and cost-effectiveness of routine urinalysis require evaluation.

Purpose of the Study:

• To assess the yield and cost-effectiveness of routine dipstick urinalysis in pediatric hospital admissions.
• To determine the impact of confirmatory testing and artifact elimination on urinalysis abnormality rates.
• To evaluate the necessity of universal urinalysis screening in this patient population.

Main Methods:

• A cohort of 954 pediatric patients underwent initial dipstick urinalysis.
• Abnormal results (glucosuria, hematuria, proteinuria) were re-evaluated with a second urinalysis, eliminating artifacts.
• House staff compliance was monitored via verbal prompts to ensure follow-up.
• Costs associated with screening, diagnosis, and treatment were calculated.

Main Results:

• Initial rates of glucosuria, hematuria, and proteinuria were 6.0%, 5.3%, and 2.5%.
• Confirmatory testing reduced these rates to 0.9%, 2.2%, and 0.6%, respectively.
• Four new diagnoses were identified (diabetes mellitus, pelvic kidney, sickle cell trait, asymptomatic bacteriuria), but patient benefit was questionable.
• A 95% follow-up rate was achieved through staff prompts.

Conclusions:

• Routine screening urinalysis on all pediatric hospital admissions is difficult to justify based on cost and questionable benefit.
• Confirmatory testing and artifact elimination are crucial for accurate urinalysis interpretation.
• Selective screening criteria should be applied, and the cost-benefit of any screening program must be carefully considered.