Document Detail

The performance of an infra-red interactance instrument for assessing total body fat.
MedLine Citation:
PMID:  9413864     Owner:  NLM     Status:  MEDLINE    
Infra-red interactance has been evaluated as a technique for measuring total body fat in comparison with a range of alternative methods. The alternative techniques employed were neutron activation analysis, tritiated water dilution, whole-body potassium-40 counting, skinfold anthropometry, bioelectrical impedance analysis and the body mass index. The study group consisted of 43 healthy adults (16 males and 27 females). For 11 women, measurements were obtained before and after 11 weeks on a very low-calorie diet, giving a total of 54 sets of data. Correlation coefficients between infra-red interactance and the other techniques varied between 0.58 (p < 0.0002) and 0.80 (p < 0.0001) for females, and between 0.64 (p < 0.009) and 0.94 (p < 0.0001) for males. The average fat for the study group was underestimated by 15% using infra-red interactance in comparison with the average fat obtained from the other techniques. It was also noted that the infra-red interactance instrument yielded a very narrow range of body fats in females in comparison with the other techniques. It is essential that these differences are reconciled before infra-red interactance takes a significant role in body composition analysis.
D W Thomas; S J Ryde; P A Ali; J L Birks; C J Evans; N H Saunders; S Al-Zeibak; J Dutton; D A Hancock
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Publication Detail:
Type:  Clinical Trial; Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Physiological measurement     Volume:  18     ISSN:  0967-3334     ISO Abbreviation:  Physiol Meas     Publication Date:  1997 Nov 
Date Detail:
Created Date:  1998-01-30     Completed Date:  1998-01-30     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9306921     Medline TA:  Physiol Meas     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  305-15     Citation Subset:  IM    
Department of Medical Physics and Clinical Engineering, Singleton Hospital, Swansea NHS Trust, UK.
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MeSH Terms
Adipose Tissue / anatomy & histology*
Body Composition*
Body Mass Index
Body Weight / physiology
Electric Impedance
Infrared Rays / diagnostic use*
Neutron Activation Analysis
Potassium Radioisotopes / analysis
Reference Values
Skinfold Thickness
Reg. No./Substance:
0/Potassium Radioisotopes

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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