Comparison of body fatness measurements by near-infrared reactance and dual-energy X-ray absorptiometry in normal-weight and obese black and white women

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dc.contributor.authorJennings, Courtney L
dc.contributor.authorMicklesfield, Lisa K
dc.contributor.authorLambert, Mike I
dc.contributor.authorLambert, Estelle V
dc.contributor.authorCollins, Malcolm
dc.contributor.authorGoedecke, Julia H
dc.date.accessioned2021-10-08T07:20:42Z
dc.date.available2021-10-08T07:20:42Z
dc.date.issued2010
dc.description.abstractThe aim of the present study was to compare body fat percent (BF %) using single-site near-IR reactance (NIR) and dual-energy X-ray absorptiometry (DXA) in a cohort of normal-weight (BMI < 25 kg/m2) black (n 102) and white (n 71); and obese (BMI > or = 30 kg/m2) black (n 117) and white (n 41) South African women (18-45 years). NIR-derived BF % was significantly correlated with DXA-derived BF % in all groups: normal-weight black (r 0.55, 95 % CI: 0.40, 0.67, P < 0.001) and white (r 0.69, 95 % CI: 0.53, 0.79, P < 0.001) women; obese black (r 0.59, 95 % CI: 0.46, 0.70, P < 0.001) and white (r 0.56, 95 % CI: 0.30, 0.74, P < 0.001) women. NIR under-predicted BF% compared to DXA in black women (normal-weight, - 4.36 (sd 4.13) % and obese, - 3.41 (sd 3.72) %), while smaller mean differences were observed in white women (normal-weight, - 0.29 (sd 4.19) % and obese, - 0.81 (sd 3.09) %), irrespective of normal-weight or obese status (P < 0.001). In obese subjects, NIR-derived BF % did not measure values greater than approximately 45 %, while the maximum DXA-derived measure was 58 %. In conclusion, although there was a significant relationship between NIR- and DXA-derived BF %, NIR under-predicted BF % in normal-weight and obese black South African women compared to DXA, but to a greater extent in subjects with very high levels of adiposity (>45 %). The results of single-site NIR as a measure of BF % should therefore be interpreted with caution, particularly in women of African descent and in those with very high levels of adiposity.
dc.identifier.apacitationJennings, C. L., Micklesfield, L. K., Lambert, M. I., Lambert, E. V., Collins, M., & Goedecke, J. H. (2010). Comparison of body fatness measurements by near-infrared reactance and dual-energy X-ray absorptiometry in normal-weight and obese black and white women. <i>The British Journal of Nutrition</i>, 103(7), 1065 - 177. http://hdl.handle.net/11427/34986en_ZA
dc.identifier.chicagocitationJennings, Courtney L, Lisa K Micklesfield, Mike I Lambert, Estelle V Lambert, Malcolm Collins, and Julia H Goedecke "Comparison of body fatness measurements by near-infrared reactance and dual-energy X-ray absorptiometry in normal-weight and obese black and white women." <i>The British Journal of Nutrition</i> 103, 7. (2010): 1065 - 177. http://hdl.handle.net/11427/34986en_ZA
dc.identifier.citationJennings, C.L., Micklesfield, L.K., Lambert, M.I., Lambert, E.V., Collins, M. & Goedecke, J.H. 2010. Comparison of body fatness measurements by near-infrared reactance and dual-energy X-ray absorptiometry in normal-weight and obese black and white women. <i>The British Journal of Nutrition.</i> 103(7):1065 - 177. http://hdl.handle.net/11427/34986en_ZA
dc.identifier.issn0007-1145
dc.identifier.issn1475-2662
dc.identifier.ris TY - Journal Article AU - Jennings, Courtney L AU - Micklesfield, Lisa K AU - Lambert, Mike I AU - Lambert, Estelle V AU - Collins, Malcolm AU - Goedecke, Julia H AB - The aim of the present study was to compare body fat percent (BF %) using single-site near-IR reactance (NIR) and dual-energy X-ray absorptiometry (DXA) in a cohort of normal-weight (BMI < 25 kg/m2) black (n 102) and white (n 71); and obese (BMI > or = 30 kg/m2) black (n 117) and white (n 41) South African women (18-45 years). NIR-derived BF % was significantly correlated with DXA-derived BF % in all groups: normal-weight black (r 0.55, 95 % CI: 0.40, 0.67, P < 0.001) and white (r 0.69, 95 % CI: 0.53, 0.79, P < 0.001) women; obese black (r 0.59, 95 % CI: 0.46, 0.70, P < 0.001) and white (r 0.56, 95 % CI: 0.30, 0.74, P < 0.001) women. NIR under-predicted BF% compared to DXA in black women (normal-weight, - 4.36 (sd 4.13) % and obese, - 3.41 (sd 3.72) %), while smaller mean differences were observed in white women (normal-weight, - 0.29 (sd 4.19) % and obese, - 0.81 (sd 3.09) %), irrespective of normal-weight or obese status (P < 0.001). In obese subjects, NIR-derived BF % did not measure values greater than approximately 45 %, while the maximum DXA-derived measure was 58 %. In conclusion, although there was a significant relationship between NIR- and DXA-derived BF %, NIR under-predicted BF % in normal-weight and obese black South African women compared to DXA, but to a greater extent in subjects with very high levels of adiposity (>45 %). The results of single-site NIR as a measure of BF % should therefore be interpreted with caution, particularly in women of African descent and in those with very high levels of adiposity. DA - 2010 DB - OpenUCT DP - University of Cape Town IS - 7 J1 - The British Journal of Nutrition LK - https://open.uct.ac.za PY - 2010 SM - 0007-1145 SM - 1475-2662 T1 - Comparison of body fatness measurements by near-infrared reactance and dual-energy X-ray absorptiometry in normal-weight and obese black and white women TI - Comparison of body fatness measurements by near-infrared reactance and dual-energy X-ray absorptiometry in normal-weight and obese black and white women UR - http://hdl.handle.net/11427/34986 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/34986
dc.identifier.vancouvercitationJennings CL, Micklesfield LK, Lambert MI, Lambert EV, Collins M, Goedecke JH. Comparison of body fatness measurements by near-infrared reactance and dual-energy X-ray absorptiometry in normal-weight and obese black and white women. The British Journal of Nutrition. 2010;103(7):1065 - 177. http://hdl.handle.net/11427/34986.en_ZA
dc.language.isoeng
dc.publisher.departmentDivision of Exercise Science and Sports Medicine
dc.publisher.facultyFaculty of Health Sciences
dc.sourceThe British Journal of Nutrition
dc.source.journalissue7
dc.source.journalvolume103
dc.source.pagination1065 - 177
dc.source.urihttps://dx.doi.org/10.1017/S0007114509992546
dc.subject.otherEthnicity
dc.subject.otherDual-energy X-ray absorptiometry
dc.subject.otherBody composition
dc.subject.otherObesity
dc.subject.otherNutritional status
dc.subject.otherMammalia
dc.subject.otherHuman
dc.subject.otherFemale
dc.subject.otherWhite
dc.subject.otherBlack
dc.subject.otherWeight
dc.subject.otherNormal
dc.subject.otherX ray
dc.subject.otherDual energy absorptiometry
dc.subject.otherComparative study
dc.subject.otherNutrition disorder
dc.subject.otherVertebrata
dc.subject.otherEtat nutritionnel
dc.subject.otherComposition corporelle
dc.subject.otherHomme
dc.subject.otherObésité
dc.subject.otherFemelle
dc.subject.otherBlanc
dc.subject.otherNoir
dc.subject.otherPoids
dc.subject.otherRayon X
dc.subject.otherAbsorptiométrie biphotonique
dc.titleComparison of body fatness measurements by near-infrared reactance and dual-energy X-ray absorptiometry in normal-weight and obese black and white women
dc.typeJournal Article
uct.type.publicationResearch
uct.type.resourceJournal Article
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