A Reliability and Criterion-Related Validity Study of Bioelectric Impedance Analysis (BIA)
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Authors
Iannone, Delores P.
Issue Date
1988-12
Type
Thesis
Language
en_US
Keywords
Impedance, Bioelectric--Validity , Impedance, Bioelectric--Reliability , Impedance, Bioelectric--Analysis
Alternative Title
Abstract
The problem. The purpose of this study was to
determine the reliability and criterion-related validity of bioelectrical impedance analysis (BIA) as a method of monitoring fluid changes in congestive heart failure (CHF) patients undergoing diuresis.
Procedure. Thirty hospitalized CHF patients
undergoing diuresis were measured with BIA and weighed prior to the administration of a diuretic and 24 hours thereafter. An intake-output (I-0) record was obtained during this time period. Daily body weights (BWT) and
I-0 records served as the criteria by which to compare the BIA measurements. A reliability coefficient on 10 normal age-matched subjects was obtained using a test-retest approach.
Findings. Statistically significant relationships were found between BIA total body water (TBW) and BWT,
r = .729 (p<.001) and BIA-TBW and I-0, r = .745 (p<.001) when the average of right and left TBWs was obtained.
The BIA-TBW taken from the non-dominant side of the body also resulted in strong correlations with BWT and I-0,
r = .648 (p<.001), r = .704 (p<.001) respectively. The BIA-TBW taken from the dominant side correlated well with
BWT, r = .515 (p = .001), but did not correlate
significantly with I-0, r = .451 (p = .024). A
reliability coefficient of .9984 was obtained.
Conclusions. The results of this study indicate
that BIA is a reliable technique and comparable to the traditional methods of DBW and I-0 in fluid assessment of CHF patients undergoing diuresis.
Recommendations. Repeating the study with the
inclusion of reliability and validity determinations of the criteria standards will improve the integrity of the study. In addition, further refinement of BIA technology
identifying hydration abnormalities and using the average of right and left BIA-TBWs will result in more accurate data in patient populations.
Description
107 leaves
Citation
Publisher
Drake University