title: Replacing 24-h Albumin Excretion with a Shorter Collection Period in Preeclampsia.
abstract: OBJECTIVE
  To evaluate whether the gold standard of 24-h urinary albumin excretion in preeclamptic women could be substituted by a shorter collection period.
  
  
  METHODS
  From each woman, three spot, two 12-h, and one 24-h urine samples were collected. For each sample, urine albumin concentrations in milligram per liter were analyzed by the immunoturbidimetric method. The albumin concentrations in the spot and 12-h collections (day and night) were compared with the 24-h urine collection.
  
  
  RESULTS
  Albumin concentrations in both 12-h collections were fitted closely with the concentrations of the 24-h collection. The median difference between the 24-h collection and the day collection was 43 mg/L and the correlation coefficient was 0.96 (p < 0.0001). The median difference between the night collection and the 24-h collection was -31 mg/L and the correlation coefficient was 0.98 (p < 0.0001).
  
  
  CONCLUSIONS
  The gold standard of 24-h urinary albumin concentrations in preeclamptic women can be substituted with a 12-h collection. Spot samples were weaker as compared to the 12-h collection.
authors.affiliation: Department of Obstetrics and Gynecology, Kasturba Medical College (Manipal Academy of Higher Education), Mangalore, India ; Prabhu Polyclinic, 95, New Scheme Road, Pollachi, 642002 Tamil Nadu India.
authors.forename: Savitha
authors.initials: S
authors.lastname: Rangasamy
authors.forename: Arun
authors.initials: A
authors.lastname: Rao
keywords: Albuminuria; Preeclampsia; Shorter collection period
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