An investigation into the validity of percentage body fat estimations by a new bioelectrical impedance analyser

Hdl Handle:
http://hdl.handle.net/10034/107539
Title:
An investigation into the validity of percentage body fat estimations by a new bioelectrical impedance analyser
Authors:
Irving, Catherine M A
Abstract:
This study was designed to assess the validity of a new method of estimating per cent body fat (%BF) by bioelectrical impedance (BIA). Both models of the new analyser, Tanita TBF 305 and TBF 511 were used to estimate %BF in a sample of active Caucasian adults: 16 male and 23 female. Males: mean age 45.37+ 9.16 years, mean weight 62.10±8.30 kg. Females: mean age 41.96±8.01 years; mean weight 62.10±8.30kg. The new analysers were validated against estimates of %BF by Densitometry (D), compared with sum of skinfolds (SS), BIA Bodystat 1500 (BS) and calculated %BF from BMI. Paired 't' tests were conducted on all methods and compared to D. Bias and 95% Limits of Agreement were calculated using the method of Bland and Altman. Results showed that all methods overestimated %BF significantly in relation to D, except with BS in men. Statistical analysis using paired 't' test and the Bland & Altman method of calculating bias and 95% Limits of Agreement was TBF305 1.18 ± 7.50 %BF for men and 7.40 ± 12.84 %BF for women; TBF 511, 2.14 ± 7.54 %BF for men and 8.40 ± 11.72 %BF for women. It was concluded that because the bias and 95% Limits of Agreement suggested that the new method will overestimate significantly in comparison to D that it could not be recommended as a valid method of estimating %BF and that its use even as a comparative measure of %BF in large epidemiological studies is limited.
Advisors:
Cotterrell, David; Williams, Alun
Publisher:
University of Liverpool (Chester College of Higher Education)
Issue Date:
Oct-1997
URI:
http://hdl.handle.net/10034/107539
Type:
Thesis or dissertation
Language:
en
Appears in Collections:
MPhil / PhD Theses and Masters Dissertations

Full metadata record

DC FieldValue Language
dc.contributor.advisorCotterrell, Daviden
dc.contributor.advisorWilliams, Alunen
dc.contributor.authorIrving, Catherine M Aen
dc.date.accessioned2010-07-13T11:24:39Z-
dc.date.available2010-07-13T11:24:39Z-
dc.date.issued1997-10-
dc.identifier.urihttp://hdl.handle.net/10034/107539-
dc.description.abstractThis study was designed to assess the validity of a new method of estimating per cent body fat (%BF) by bioelectrical impedance (BIA). Both models of the new analyser, Tanita TBF 305 and TBF 511 were used to estimate %BF in a sample of active Caucasian adults: 16 male and 23 female. Males: mean age 45.37+ 9.16 years, mean weight 62.10±8.30 kg. Females: mean age 41.96±8.01 years; mean weight 62.10±8.30kg. The new analysers were validated against estimates of %BF by Densitometry (D), compared with sum of skinfolds (SS), BIA Bodystat 1500 (BS) and calculated %BF from BMI. Paired 't' tests were conducted on all methods and compared to D. Bias and 95% Limits of Agreement were calculated using the method of Bland and Altman. Results showed that all methods overestimated %BF significantly in relation to D, except with BS in men. Statistical analysis using paired 't' test and the Bland & Altman method of calculating bias and 95% Limits of Agreement was TBF305 1.18 ± 7.50 %BF for men and 7.40 ± 12.84 %BF for women; TBF 511, 2.14 ± 7.54 %BF for men and 8.40 ± 11.72 %BF for women. It was concluded that because the bias and 95% Limits of Agreement suggested that the new method will overestimate significantly in comparison to D that it could not be recommended as a valid method of estimating %BF and that its use even as a comparative measure of %BF in large epidemiological studies is limited.en
dc.language.isoenen
dc.publisherUniversity of Liverpool (Chester College of Higher Education)en
dc.subjectper cent body faten
dc.subjectbioelectrical impedanceen
dc.subjectdensitometryen
dc.subjectsum of skinfoldsen
dc.subjectTanitaen
dc.subjectBodystaten
dc.subjectlimits of agreementen
dc.titleAn investigation into the validity of percentage body fat estimations by a new bioelectrical impedance analyseren
dc.typeThesis or dissertationen
dc.type.qualificationnameMScen
dc.type.qualificationlevelMasters Degreeen
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