Urine Reagent Strips Are Inaccurate for Assessing Hypohydration: A Brief Report

J. D. Adams, Catalina Capitan-Jiménez, Robert A. Huggins, Douglas J. Casa, Andy Mauromoustakos, Stavros A. Kavouras

Research output: Contribution to journalArticle

Abstract

OBJECTIVE: To assess the diagnostic ability of urine reagent strips to identify hypohydration based on urine specific gravity (USG). DESIGN: This study examined the agreement of USG between strips and refractometry with Bland-Altman, whereas the diagnostic ability of the strips to assess hypohydration was performed by receiver operating characteristic analysis. SETTING: Arkansas high school football preseason practice. PARTICIPANTS: Four hundred fourteen fresh urine samples were analyzed. MAIN OUTCOME MEASURES: Urine specific gravity was assessed by both reagent strips and refractometry. Cutoffs of >1.020 and >1.025 were used for identifying hypohydration. RESULTS: Bland-Altman analysis showed agreement of the 2 methods. Overall diagnostic ability of the urine strip to identify hypohydration was fair (area under the curve 72%-78%). However, the sensitivity to correctly identify hypohydration was poor (63%-71%), and the specificity of correctly identifying euhydration was poor to fair (68%-83%). CONCLUSION: The urine strip method is not valid for assessing hypohydration.

Original languageEnglish (US)
Pages (from-to)506-508
Number of pages3
JournalClinical journal of sport medicine : official journal of the Canadian Academy of Sport Medicine
Volume29
Issue number6
DOIs
StatePublished - Nov 1 2019

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Reagent Strips
Urine
Specific Gravity
Refractometry
Football
ROC Curve
Area Under Curve

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

Cite this

Urine Reagent Strips Are Inaccurate for Assessing Hypohydration : A Brief Report. / Adams, J. D.; Capitan-Jiménez, Catalina; Huggins, Robert A.; Casa, Douglas J.; Mauromoustakos, Andy; Kavouras, Stavros A.

In: Clinical journal of sport medicine : official journal of the Canadian Academy of Sport Medicine, Vol. 29, No. 6, 01.11.2019, p. 506-508.

Research output: Contribution to journalArticle

Adams, J. D. ; Capitan-Jiménez, Catalina ; Huggins, Robert A. ; Casa, Douglas J. ; Mauromoustakos, Andy ; Kavouras, Stavros A. / Urine Reagent Strips Are Inaccurate for Assessing Hypohydration : A Brief Report. In: Clinical journal of sport medicine : official journal of the Canadian Academy of Sport Medicine. 2019 ; Vol. 29, No. 6. pp. 506-508.
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