title: Reliability of single-sample phosphorus fractional excretion determination as a measure of daily phosphorus renal clearance in equids.
abstract: In 4 healthy horses and 1 Welsh pony, fractional renal excretions of phosphorus (FEp) determined from 9 hourly time collections taken over a 24-hour period were compared to assess whether a single-sample collection would be an accurate indicator of the daily FEp. The mean FEp for each animal varied from 0.115% to 0.302%; the 2 animals with the highest values were significantly different (P less than 0.05) from the 3 with the lowest values. Individual variation within animals was not great, however, because it was calculated that the 24-hour FEp value could be found within +/- 0.087% of the single sample value 95% of the time in a given animal.
mesh_terms: D000818:Animals; D003404:Creatinine / Q000378:metabolism; D005260:Female; D005919:Glomerular Filtration Rate / Q000662:veterinary; D006736:Horses / Q000378:metabolism*; D007668:Kidney / Q000378:metabolism*; D008297:Male; D010758:Phosphorus / Q000378:metabolism*
chemical_list: D010758:Phosphorus; D003404:Creatinine