Back to Search
Start Over
At-home determination of 24-h urine sodium excretion: Validation of chloride test strips and multiple spot samples
- Source :
- Autonomic neuroscience : basicclinical. 233
- Publication Year :
- 2020
-
Abstract
- Sodium intake and compliance with dietary sodium modification are typically assessed using a 24-h urine collection analyzed using flame photometry, but this is inconvenient. Spot urine samples have been investigated as alternatives to 24-h collections, but their accuracy is poor. Since sodium and chloride are present in equal concentrations in dietary salt, chloride test strips may provide a suitable proxy for at-home measurement of urine sodium concentrations. We aimed to determine whether (i) chloride test strips provide a reliable measure of urinary sodium compared to the gold standard flame photometry and (ii) multiple spot samples accurately reflect 24-h urine sodium. We recruited 43 participants (19 males) aged 23.6 ± 0.6 years to complete multiple consecutive spot samples (morning and evening) along with a 24-h urine sodium collection. Urine 24-h sodium estimates using chloride test strips (114.6 ± 7.5 mmol/day) were highly correlated (r = 0.900, p 0.0001) with flame photometry (121.1 ± 7.7 mmol/day) with a bias of -6.53 ± 22.2 mmol/day. Use of a three-spot sample average (both morning and evening spot samples) with a correction factor applied (122.9 ± 4.1 mmol/day) provided a good approximation of 24-h sodium measured by flame photometry (125.6 ± 9.0 mmol/day), with a bias of -2.55 ± 43.9 mmol/day. Chloride test strips applied to a 24-h urine collection provide a highly accurate measure of urinary sodium excretion, permitting convenient at-home sample collection and analysis. Their application to multiple spot samples provides a reasonable approximation of sodium excretion that can be used to conveniently monitor attempts at dietary sodium manipulation, without the inconvenience of completing a 24-h urine sample.
- Subjects :
- Male
Sodium
chemistry.chemical_element
Urine
Urinalysis
Chloride
Urine sodium
03 medical and health sciences
Cellular and Molecular Neuroscience
0302 clinical medicine
Chlorides
Sodium excretion
medicine
Humans
Sodium Chloride, Dietary
Morning
24 h urine
Chromatography
Endocrine and Autonomic Systems
Chemistry
Chloride test
Sodium, Dietary
Neurology (clinical)
030217 neurology & neurosurgery
medicine.drug
Subjects
Details
- ISSN :
- 18727484
- Volume :
- 233
- Database :
- OpenAIRE
- Journal :
- Autonomic neuroscience : basicclinical
- Accession number :
- edsair.doi.dedup.....89a701a0086acbe8b7134b758d233a09