Discordance of international adiposity classifications in Australian boys and girls - The LOOK study

Richard D. Telford; Ross B. Cunningham; Robin M. Daly; Graham J. Reynolds; Antony R.A. Lafferty; Karen J. Gravenmaker; Marc M. Budge; Ahmad Javaid; Shona L. Bass; Rohan M. Telford

doi:10.1080/03014460802014625

Discordance of international adiposity classifications in Australian boys and girls - The LOOK study

Richard D. Telford, Ross B. Cunningham, Robin M. Daly, Graham J. Reynolds, Antony R.A. Lafferty, Karen J. Gravenmaker, Marc M. Budge, Ahmad Javaid, Shona L. Bass, Rohan M. Telford

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

Background: Various charts based on body mass index (BMI) and per cent body fat (%BF) are used to classify childhood body composition but outcomes may vary. Aim: The study investigated variation in incidences of childhood obesity as depicted by four classification charts. Subjects and methods: BMI and DXA-derived %BF were assessed in 741 children. Incidences of overweight and obesity were compared between two BMI charts and two bioelectrical impedance (BIA)-based %BF charts. Results: The International Obesity Task Force (IOTF)-adopted BMI chart designated 21%, 6% (boys), and 26%, 9% (girls) as overweight and obese, respectively. Corresponding figures using the USA CDC BMI chart were 27%, 11% (boys) and 27%, 12% (girls). Using a USA-derived %BF chart incidences were 17%, 2% (boys) and 21%, 8% (girls) and using a UK-derived %BF chart 51%, 24% (boys) and 53%, 36% (girls). Sensitivity of BMI varied according to the %BF reference chart. Conclusions: In contrast to the BMI-based charts, there were considerable variations in depicted incidences of obesity between the %BF-based charts. These discordances were considered to result from previously reported variation within and between BIA and DXA %BF assessments underlying the charts. The present study highlights the need for valid, reliable, unchanging BIA and DXA procedures.

Original language	English
Pages (from-to)	334-341
Number of pages	8
Journal	Annals of Human Biology
Volume	35
Issue number	3
DOIs	https://doi.org/10.1080/03014460802014625
Publication status	Published - May 2008

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@article{47735a48e6b5406a8d0d3b695f0dff48,

title = "Discordance of international adiposity classifications in Australian boys and girls - The LOOK study",

abstract = "Background: Various charts based on body mass index (BMI) and per cent body fat (%BF) are used to classify childhood body composition but outcomes may vary. Aim: The study investigated variation in incidences of childhood obesity as depicted by four classification charts. Subjects and methods: BMI and DXA-derived %BF were assessed in 741 children. Incidences of overweight and obesity were compared between two BMI charts and two bioelectrical impedance (BIA)-based %BF charts. Results: The International Obesity Task Force (IOTF)-adopted BMI chart designated 21%, 6% (boys), and 26%, 9% (girls) as overweight and obese, respectively. Corresponding figures using the USA CDC BMI chart were 27%, 11% (boys) and 27%, 12% (girls). Using a USA-derived %BF chart incidences were 17%, 2% (boys) and 21%, 8% (girls) and using a UK-derived %BF chart 51%, 24% (boys) and 53%, 36% (girls). Sensitivity of BMI varied according to the %BF reference chart. Conclusions: In contrast to the BMI-based charts, there were considerable variations in depicted incidences of obesity between the %BF-based charts. These discordances were considered to result from previously reported variation within and between BIA and DXA %BF assessments underlying the charts. The present study highlights the need for valid, reliable, unchanging BIA and DXA procedures.",

keywords = "Body mass index, Children, DXA, Obesity, Percent fat",

author = "Telford, {Richard D.} and Cunningham, {Ross B.} and Daly, {Robin M.} and Reynolds, {Graham J.} and Lafferty, {Antony R.A.} and Gravenmaker, {Karen J.} and Budge, {Marc M.} and Ahmad Javaid and Bass, {Shona L.} and Telford, {Rohan M.}",

year = "2008",

month = may,

doi = "10.1080/03014460802014625",

language = "English",

volume = "35",

pages = "334--341",

journal = "Annals of Human Biology",

issn = "0301-4460",

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T1 - Discordance of international adiposity classifications in Australian boys and girls - The LOOK study

AU - Telford, Richard D.

AU - Cunningham, Ross B.

AU - Daly, Robin M.

AU - Reynolds, Graham J.

AU - Lafferty, Antony R.A.

AU - Gravenmaker, Karen J.

AU - Budge, Marc M.

AU - Javaid, Ahmad

AU - Bass, Shona L.

AU - Telford, Rohan M.

PY - 2008/5

Y1 - 2008/5

N2 - Background: Various charts based on body mass index (BMI) and per cent body fat (%BF) are used to classify childhood body composition but outcomes may vary. Aim: The study investigated variation in incidences of childhood obesity as depicted by four classification charts. Subjects and methods: BMI and DXA-derived %BF were assessed in 741 children. Incidences of overweight and obesity were compared between two BMI charts and two bioelectrical impedance (BIA)-based %BF charts. Results: The International Obesity Task Force (IOTF)-adopted BMI chart designated 21%, 6% (boys), and 26%, 9% (girls) as overweight and obese, respectively. Corresponding figures using the USA CDC BMI chart were 27%, 11% (boys) and 27%, 12% (girls). Using a USA-derived %BF chart incidences were 17%, 2% (boys) and 21%, 8% (girls) and using a UK-derived %BF chart 51%, 24% (boys) and 53%, 36% (girls). Sensitivity of BMI varied according to the %BF reference chart. Conclusions: In contrast to the BMI-based charts, there were considerable variations in depicted incidences of obesity between the %BF-based charts. These discordances were considered to result from previously reported variation within and between BIA and DXA %BF assessments underlying the charts. The present study highlights the need for valid, reliable, unchanging BIA and DXA procedures.

AB - Background: Various charts based on body mass index (BMI) and per cent body fat (%BF) are used to classify childhood body composition but outcomes may vary. Aim: The study investigated variation in incidences of childhood obesity as depicted by four classification charts. Subjects and methods: BMI and DXA-derived %BF were assessed in 741 children. Incidences of overweight and obesity were compared between two BMI charts and two bioelectrical impedance (BIA)-based %BF charts. Results: The International Obesity Task Force (IOTF)-adopted BMI chart designated 21%, 6% (boys), and 26%, 9% (girls) as overweight and obese, respectively. Corresponding figures using the USA CDC BMI chart were 27%, 11% (boys) and 27%, 12% (girls). Using a USA-derived %BF chart incidences were 17%, 2% (boys) and 21%, 8% (girls) and using a UK-derived %BF chart 51%, 24% (boys) and 53%, 36% (girls). Sensitivity of BMI varied according to the %BF reference chart. Conclusions: In contrast to the BMI-based charts, there were considerable variations in depicted incidences of obesity between the %BF-based charts. These discordances were considered to result from previously reported variation within and between BIA and DXA %BF assessments underlying the charts. The present study highlights the need for valid, reliable, unchanging BIA and DXA procedures.

KW - Body mass index

KW - Children

KW - DXA

KW - Obesity

KW - Percent fat

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DO - 10.1080/03014460802014625

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SN - 0301-4460

VL - 35

SP - 334

EP - 341

JO - Annals of Human Biology

JF - Annals of Human Biology

IS - 3

ER -

Discordance of international adiposity classifications in Australian boys and girls - The LOOK study

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