Bioelectric impedance is a better indicator of obesity in men with schizophrenia than body mass index

Jenny Kay Sharpe, Nuala M. Byrne, Terry J. Stedman, Andrew P. Hills

Research output: Contribution to journalArticleResearchpeer-review

2 Citations (Scopus)

Abstract

Body mass index (BMI) is commonly used as an indicator of obesity, although in both clinical and research settings the use of bioelectric impedance analysis (BIA) is commonplace. The purpose of this study was to examine the relationship between BMI, BIA and percentage body fat to determine whether either is a superior indicator of obesity in men with schizophrenia. The reference method of deuterium dilution was used to measure total body water and, subsequently, percentage body fat in 31 men with schizophrenia. Comparisons with the classification of body fat using BMI and BIA were made. The correlation between percentage body fat and BMI was 0.64 whereas the correlation between percentage body fat and BIA was 0.90. The sensitivity and specificity in distinguishing between obese and overweight participants was 0.55 and 0.80 for BMI and 0.86 and 0.75 for BIA. BIA proved to be a better indicator of obesity than BMI. BMI misclassified a large proportion of men with schizophrenia as overweight when they had excess adiposity of sufficient magnitude to be considered as obese. Because of the widespread use of BMI as an indicator of obesity among people with schizophrenia, the level of obesity among men with schizophrenia may be in excess of that previously indicated.

Original languageEnglish
Pages (from-to)121-126
Number of pages6
JournalPsychiatry Research
Volume159
Issue number1-2
DOIs
Publication statusPublished - 30 May 2008
Externally publishedYes

Fingerprint

Electric Impedance
Schizophrenia
Body Mass Index
Obesity
Adipose Tissue
Fat Body
Body Water
Deuterium
Adiposity
Sensitivity and Specificity
Research

Cite this

Sharpe, Jenny Kay ; Byrne, Nuala M. ; Stedman, Terry J. ; Hills, Andrew P. / Bioelectric impedance is a better indicator of obesity in men with schizophrenia than body mass index. In: Psychiatry Research. 2008 ; Vol. 159, No. 1-2. pp. 121-126.
@article{4ea0f88710ef4ed69e4239be8ab19901,
title = "Bioelectric impedance is a better indicator of obesity in men with schizophrenia than body mass index",
abstract = "Body mass index (BMI) is commonly used as an indicator of obesity, although in both clinical and research settings the use of bioelectric impedance analysis (BIA) is commonplace. The purpose of this study was to examine the relationship between BMI, BIA and percentage body fat to determine whether either is a superior indicator of obesity in men with schizophrenia. The reference method of deuterium dilution was used to measure total body water and, subsequently, percentage body fat in 31 men with schizophrenia. Comparisons with the classification of body fat using BMI and BIA were made. The correlation between percentage body fat and BMI was 0.64 whereas the correlation between percentage body fat and BIA was 0.90. The sensitivity and specificity in distinguishing between obese and overweight participants was 0.55 and 0.80 for BMI and 0.86 and 0.75 for BIA. BIA proved to be a better indicator of obesity than BMI. BMI misclassified a large proportion of men with schizophrenia as overweight when they had excess adiposity of sufficient magnitude to be considered as obese. Because of the widespread use of BMI as an indicator of obesity among people with schizophrenia, the level of obesity among men with schizophrenia may be in excess of that previously indicated.",
author = "Sharpe, {Jenny Kay} and Byrne, {Nuala M.} and Stedman, {Terry J.} and Hills, {Andrew P.}",
year = "2008",
month = "5",
day = "30",
doi = "10.1016/j.psychres.2007.08.010",
language = "English",
volume = "159",
pages = "121--126",
journal = "Psychiatry Research",
issn = "0165-1781",
publisher = "Elsevier",
number = "1-2",

}

Bioelectric impedance is a better indicator of obesity in men with schizophrenia than body mass index. / Sharpe, Jenny Kay; Byrne, Nuala M.; Stedman, Terry J.; Hills, Andrew P.

In: Psychiatry Research, Vol. 159, No. 1-2, 30.05.2008, p. 121-126.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Bioelectric impedance is a better indicator of obesity in men with schizophrenia than body mass index

AU - Sharpe, Jenny Kay

AU - Byrne, Nuala M.

AU - Stedman, Terry J.

AU - Hills, Andrew P.

PY - 2008/5/30

Y1 - 2008/5/30

N2 - Body mass index (BMI) is commonly used as an indicator of obesity, although in both clinical and research settings the use of bioelectric impedance analysis (BIA) is commonplace. The purpose of this study was to examine the relationship between BMI, BIA and percentage body fat to determine whether either is a superior indicator of obesity in men with schizophrenia. The reference method of deuterium dilution was used to measure total body water and, subsequently, percentage body fat in 31 men with schizophrenia. Comparisons with the classification of body fat using BMI and BIA were made. The correlation between percentage body fat and BMI was 0.64 whereas the correlation between percentage body fat and BIA was 0.90. The sensitivity and specificity in distinguishing between obese and overweight participants was 0.55 and 0.80 for BMI and 0.86 and 0.75 for BIA. BIA proved to be a better indicator of obesity than BMI. BMI misclassified a large proportion of men with schizophrenia as overweight when they had excess adiposity of sufficient magnitude to be considered as obese. Because of the widespread use of BMI as an indicator of obesity among people with schizophrenia, the level of obesity among men with schizophrenia may be in excess of that previously indicated.

AB - Body mass index (BMI) is commonly used as an indicator of obesity, although in both clinical and research settings the use of bioelectric impedance analysis (BIA) is commonplace. The purpose of this study was to examine the relationship between BMI, BIA and percentage body fat to determine whether either is a superior indicator of obesity in men with schizophrenia. The reference method of deuterium dilution was used to measure total body water and, subsequently, percentage body fat in 31 men with schizophrenia. Comparisons with the classification of body fat using BMI and BIA were made. The correlation between percentage body fat and BMI was 0.64 whereas the correlation between percentage body fat and BIA was 0.90. The sensitivity and specificity in distinguishing between obese and overweight participants was 0.55 and 0.80 for BMI and 0.86 and 0.75 for BIA. BIA proved to be a better indicator of obesity than BMI. BMI misclassified a large proportion of men with schizophrenia as overweight when they had excess adiposity of sufficient magnitude to be considered as obese. Because of the widespread use of BMI as an indicator of obesity among people with schizophrenia, the level of obesity among men with schizophrenia may be in excess of that previously indicated.

UR - http://www.scopus.com/inward/record.url?scp=43049124777&partnerID=8YFLogxK

U2 - 10.1016/j.psychres.2007.08.010

DO - 10.1016/j.psychres.2007.08.010

M3 - Article

VL - 159

SP - 121

EP - 126

JO - Psychiatry Research

JF - Psychiatry Research

SN - 0165-1781

IS - 1-2

ER -