Reliability and Validity of a Prototype Fluid Intake Monitor

Abstract

The Fluid Intake Monitor (FIM) measures fluid consumed from a bladder hydration system. Bench and field tests were performed to assess reliability and validity of the FIM, Fluid volumes of FIM were compared to scale-weighed volumes of water. Bench Test Results: an absolute percent error existed (p < 0.001) between sips, with the FIM significantly overestimating the first sip (p < 0.01) compared to the subsequent nine sips. A significant intraclass reliability coefficient (ICC) = 0.83 was achieved for trials 2 through 10. There was no difference in mean sip volume measured using the FIM vs. the scale (25.7 + 10.7 ml vs. 25.6 + 8.7 ml, respectively). Field Test Results: of 31 trials, 4 trials under-measured water consumption in excess of 15% (29.4% to 47.1%), and two trials over-measured water consumption in excess of 15% (15.5% and 16.6%). These units were neither reliable nor valid for use in the field. Software and hardware modifications identified should significantly improve FIM performance.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2009
Accession Number
ADA492057

Entities

People

  • Anthony J. Karis
  • Reed W. Hoyt
  • William J. Tharion

Organizations

  • United States Army Research Institute of Environmental Medicine

Tags

Communities of Interest

  • Biomedical
  • Human Systems

DTIC Thesaurus Topics

  • Accuracy
  • Bench Tests
  • Body Fluids
  • Body Water
  • Body Weight
  • Consistency
  • Data Analysis
  • Department Of Defense
  • Drinking Water
  • Field Tests
  • Measurement
  • Metabolic Diseases
  • Regression Analysis
  • Standards
  • Test And Evaluation
  • Training
  • Wounds And Injuries

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