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Low-Cost, Volume-Controlled Dipstick Urinalysis for Home-Testing
Published on: May 8, 2021
The value of urine screening in a young adult population
Peter S Topham1, Ashok Jethwa, Maggie Watkins
1Department of Nephrology, Leicester General Hospital, Leicester, UK. Peter.Topham@uhl-tr.nhs.uk
Insights
Routine urine screening for haematuria (blood in urine) or proteinuria (protein in urine) in young adults is not recommended. However, the combined presence of both indicates significant kidney disease, warranting further investigation.
Area of Science:
- Nephrology
- Urology
- General Practice
Background:
- General practitioners (GPs) in England and Wales routinely screen newly registered patients using urinalysis.
- The clinical utility of this widespread screening practice remains uncertain.
Purpose of the Study:
- To determine the prevalence of persistent urine abnormalities in young adults.
- To assess the added value of screening for haematuria and proteinuria in this demographic.
Main Methods:
- A cohort of university students underwent dipstick urinalysis for haematuria and/or proteinuria over two years.
- Persistent urine abnormalities identified through screening were further evaluated for significant renal tract pathology.
Main Results:
- Out of 3808 students screened, 38 (1%) exhibited persistent urine abnormalities.
- Isolated haematuria or proteinuria did not correlate with significant pathology.
- All students presenting with both haematuria and proteinuria were found to have identifiable renal disease.
Conclusions:
- Routine screening for isolated haematuria or proteinuria in young adults lacks demonstrated value.
- The concurrent presence of haematuria and proteinuria is a strong indicator of parenchymal renal disease.
- Testing for haematuria is recommended if proteinuria is detected during screening.
Background:
GPs in England and Wales are required to perform screening urinalysis on all newly registered patients. The value of this practice, however, is unclear.
Objective:
The purpose of this study was to identify the prevalence of persistent urine abnormalities and to establish the added value of screening for both haematuria and proteinuria in a large cohort of young adults in the UK.
Methods:
Urine screening was carried out in a cohort of young adults in a student health centre and a university hospital nephrology unit in a large British city. University students enrolling for health screening in a university health centre over a 2-year period were tested for haematuria and/or proteinuria by dipstick urinalysis. Subjects with persistent urine abnormalities were evaluated for the presence of significant renal tract pathology.
Results:
Of 3808 students screened, 3570 provided an initial urine sample; 220 were abnormal. Of these, 38 (1% of original cohort) had persistent abnormalities (haematuria, 14; proteinuria, 16; both, eight). Subjects with isolated haematuria or proteinuria did not have significant pathology. In contrast, all the students with both haematuria and proteinuria had identifiable renal disease.
Conclusions:
Our findings do not support the value of routine screening for proteinuria or haematuria in young adults. However, the combination of haematuria and proteinuria is a powerful predictor for parenchymal renal disease. Thus, if proteinuria is detected, further testing for haematuria should be performed.
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