scholarly journals Accuracy of the WHO’s body mass index cut-off points to measure gender- and age-specific obesity in middle-aged adults living in the city of Rio de Janeiro, Brazil

2017 ◽  
Vol 6 (2) ◽  
Author(s):  
Wollner Materko ◽  
Paulo Roberto Benchimol-Barbosa ◽  
Alysson Roncally Silva Carvalho ◽  
Jurandir Nadal ◽  
Edil Luis Santos
Keyword(s):  
Body Mass Index ◽  
Body Mass ◽  
Body Fat ◽  
Rio De Janeiro ◽  
Characteristic Curve ◽  
Public Health Problem ◽  
World Health ◽  
Middle Aged ◽  
Gender And Age ◽  
Middle Aged Adults

<em>Introduction</em>. Obesity is defined by the World Health Organization (WHO) as a disease characterized by the excessive accumulation of body fat. Obesity is considered a public health problem, leading to serious social, psychological and physical problems. However, the appropriate cut-off point of body mass index (BMI) based on body fat percentage (BF%) for classifying an individual as obese in middle-aged adults living in Rio de Janeiro remains unclear. <br /><em>Materials and methods.</em> This was a prospective cross-sectional study comprising of 856 adults (413 men and 443 women) living in Rio de Janeiro, Brazil ranging from 30-59 years of age. The data were collected over a two year period (2010-2011), and all participants were underwent anthropometric evaluation. The gold standard was the percentage of body fat estimated by bioelectrical impedance analysis. The optimal sensitivity and specificity were attained by adjusting BMI cut-off values to predict obesity based on the WHO criteria: BF% &gt;25% in men and &gt;35% in women, according to the receiver operating characteristic curve (ROC) analysis adjusted for age and for the whole group.<br /><em>Results</em>. The BMI cut-offs for predicting BF% were 29.9 kg/m2 in men and 24.9 kg/m2 in women. <br /><em>Conclusions</em>. The BMI that corresponded to a BF% previously defining obesity was similar to that of other Western populations for men but not for women. Furthermore, gender and age specific cut-off values are recommended in this population.

scholarly journals Body mass index and waist circumference are better predictors of insulin resistance than total body fat percentage in middle-aged and elderly Taiwanese

Medicine ◽  
2017 ◽  
Vol 96 (39) ◽  
pp. e8126 ◽  
Author(s):  
Yiu-Hua Cheng ◽  
Yu-Chung Tsao ◽  
I-Shiang Tzeng ◽  
Hai-Hua Chuang ◽  
Wen-Cheng Li ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Body Mass Index ◽  
Waist Circumference ◽  
Body Mass ◽  
Body Fat ◽  
Body Fat Percentage ◽  
Middle Aged ◽  
Fat Percentage ◽  
Total Body Fat ◽  
Total Body

scholarly journals Performance of newly developed body mass index cut-off for diagnosing obesity among Ethiopian adults

2019 ◽  
Vol 38 (1) ◽  
Author(s):  
Makeda Sinaga ◽  
Tilahun Yemane ◽  
Elsah Tegene ◽  
David Lidstrom ◽  
Tefera Belachew
Keyword(s):  
Body Mass Index ◽  
Body Mass ◽  
Body Fat ◽  
World Health ◽  
Body Fat Percentage ◽  
Substantial Agreement ◽  
Fat Percentage ◽  
Predictive Values ◽  
Prevalence Of Obesity ◽  
Sensitivity Specificity

Abstract Background Obesity is defined as unhealthy excess body fat, which increases the risk of premature mortality from noncommunicable diseases. Early screening and prevention of obesity is critical for averting associated morbidity, disability, and mortality. Ethiopia has been using the international (WHO’s) BMI cut-off for diagnosing obesity even though its validity among Ethiopian population was questioned. To address this problem, a new body mass index cut-off was developed for Ethiopian adults using population-specific data. However, its performance in diagnosing obesity has not been validated. Therefore, this study determined the performance of the newly developed Ethiopian and World Health Organization (WHO) BMI cut-offs in detecting obesity among Ethiopian adults. Methods A cross-sectional study was carried out among 704 employees of Jimma University from February to April 2015. The study participants were selected using simple random sampling technique based on their payroll. Data on sociodemographic variables were collected using an interviewer-administered structured questionnaire. Anthropometric parameters including body weight and height were measured according to WHO recommendation. Body fat percentage (BF%) was measured using the air displacement plethysmography (ADP) after calibration of the machine. The diagnostic accuracy of the WHO BMI cut-off (≥ 30 kg/m2) for obesity in both sexes and Ethiopian BMI cut-off (> 22.2 kg/m2 for males and >  24.5 kg/m2 for females) were compared to obesity diagnosed using ADP measured body fat percentage (> 35% for females and >  25% for males). Sensitivity, specificity, predictive values, and kappa agreements were determined to validate the performance of the BMI cut-offs. Results In males, WHO BMI cut-off has a sensitivity of 5.3% and specificity of 99.4% (Kappa = 0.047) indicating a slight agreement. However, the Ethiopian cut-off showed a sensitivity of 87.5% and specificity of 87.7% (Kappa = 0.752) indicating a substantial agreement. Similarly, in females, the WHO BMI cut-off showed a sensitivity of 46.9%, while its specificity was 100% (Kappa = 0.219) showing a fair agreement. The Ethiopian BMI cut-off demonstrated a sensitivity 80.0% and a specificity 95.6% (Kappa = 0.701) showing a substantial agreement. The WHO BMI cut-off underestimated the prevalence of obesity by a maximum of 73.7% and by a minimum of 28.3% among males, while the values for underestimation ranged from 31.4–54.1% in females. The misclassification was minimal using the newly developed Ethiopian BMI cut-off. The prevalence of obesity was underestimated by a maximum of 9.2% and overestimated by a maximum of 6.2%. The WHO BMI cut-off failed to identify nearly half (46.6%) of Ethiopian adults who met the criteria for obesity using BF% in the overall sample. Conclusions The findings suggest that WHO BMI cut-off (≥ 30 kg/m2) is not appropriate for screening obesity among Ethiopian adults. The newly developed Ethiopian BMI cut-off showed a better performance with excellent sensitivity, specificity, predictive values, and agreement indicating the diagnostic significance of it use as a simple, cost-effective, and valid indicator in clinical and community setups.

scholarly journals Sex Differences in the Influence of Sleep on Body Mass Index and Risk of Metabolic Syndrome in Middle-Aged Adults

Healthcare ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 561
Author(s):  
Hyun-E Yeom ◽  
Jungmin Lee
Keyword(s):  
Metabolic Syndrome ◽  
Body Mass Index ◽  
Body Mass ◽  
Cross Sectional Study ◽  
Poor Sleep ◽  
Middle Aged ◽  
Cross Sectional ◽  
Aged People ◽  
Middle Aged Adults ◽  
The Impact

Poor sleep and obesity are intimately related to cardiovascular diseases. We aimed to examine whether the influence of sleep and body mass index (BMI) on the risk of metabolic syndrome (MetS) differed by sex in middle-aged people. It is a cross-sectional study of 458 Korean participants who completed self-administered surveys; the data were analyzed using the PROCESS macro for SPSS. We found that both sleep and BMI were significant predictors of MetS risk in women, particularly by the role of BMI connecting the impact of sleep to MetS risk. However, the association was not found in men, showing that BMI, but not sleep, was a significant predictor of MetS. This sex-related difference was due to different relationships between sleep and BMI, indicating that BMI was more dependent on sleep quality for women than for men. Therefore, a sex-specific approach to decrease the risk of MetS is warranted.

scholarly journals Associations of changes in body mass index with all-cause and cardiovascular mortality in healthy middle-aged adults

PLoS ONE ◽  
2017 ◽  
Vol 12 (12) ◽  
pp. e0189180 ◽  
Author(s):  
In-Jeong Cho ◽  
Hyuk-Jae Chang ◽  
Ji Min Sung ◽  
Young Mi Yun ◽  
Hyeon Chang Kim ◽  
...  
Keyword(s):  
Body Mass Index ◽  
Body Mass ◽  
Cardiovascular Mortality ◽  
Middle Aged ◽  
Middle Aged Adults

scholarly journals Association of body mass index with brain structure and biomarkers of inflammation in cognitively unimpaired middle‐aged adults with and without evidence of β‐amyloid pathology

2021 ◽  
Vol 17 (S10) ◽  
Author(s):  
Oriol Grau‐Rivera ◽  
Aleix Sala‐Vila ◽  
Greg Operto ◽  
Marina Garcia ◽  
Eider M Arenaza‐Urquijo ◽  
...  
Keyword(s):  
Body Mass Index ◽  
Body Mass ◽  
Brain Structure ◽  
Middle Aged ◽  
Amyloid Pathology ◽  
Β Amyloid ◽  
Middle Aged Adults

Association of Baseline Knee Bone Size, Cartilage Volume, and Body Mass Index with Knee Cartilage Loss Over Time: A Longitudinal Study in Younger or Middle-aged Adults

2011 ◽  
Vol 38 (9) ◽  
pp. 1973-1980 ◽  
Author(s):  
BENNY ANTONY ◽  
CHANGHAI DING ◽  
OLIVER STANNUS ◽  
FLAVIA CICUTTINI ◽  
GRAEME JONES
Keyword(s):  
Body Mass Index ◽  
Body Mass ◽  
Cartilage Volume ◽  
Bone Size ◽  
Cartilage Loss ◽  
Annual Change ◽  
Knee Cartilage ◽  
Middle Aged ◽  
Negatively Associated ◽  
Middle Aged Adults

Objective.To determine the association of knee bone size, cartilage volume, and body mass index (BMI) at baseline with knee cartilage loss over 2 years in younger or middle-aged adults.Methods.A total of 324 subjects (mean age 45 yrs, range 26–61) were measured at baseline and about 2 years later. Knee cartilage volume and bone size were determined using T1-weighted fat-saturated magnetic resonance imaging.Results.In multivariable analysis, baseline knee bone size was negatively associated with annual change in knee cartilage volume at medial and lateral tibial sites (ß = −0.62% to −0.47%/cm2, all p < 0.001). The associations disappeared at medial tibial site after adjustment for baseline cartilage volume and became of borderline statistical significance at lateral tibial site after adjustment for both baseline cartilage volume and osteophytes (ß = −0.29, p = 0.059). Baseline knee cartilage volume was consistently and negatively associated with annual change in knee cartilage volume at all 3 medial tibial, lateral tibial, and patellar sites (ß = −4.41% to −1.37%/ml, all p < 0.001). Baseline BMI was negatively associated with an annual change in knee cartilage volume, but only in subjects within the upper tertile of baseline cartilage volume, even after adjusting for cartilage defects (ß = −0.16% to −0.34%/kg/m2, all p < 0.05).Conclusion.Our study suggests that both higher baseline tibial bone area and knee cartilage volume (most likely due to cartilage swelling) are associated with greater knee cartilage loss over 2 years. A higher BMI was associated with greater knee cartilage loss only in subjects with higher baseline cartilage volume.

Body mass index and the risk of new-onset atrial fibrillation in middle-aged adults

2016 ◽  
Vol 173 ◽  
pp. 41-48 ◽  
Author(s):  
Anat Berkovitch ◽  
Shaye Kivity ◽  
Robert Klempfner ◽  
Shlomo Segev ◽  
Assi Milwidsky ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Body Mass Index ◽  
Body Mass ◽  
Middle Aged ◽  
Middle Aged Adults ◽  
Onset Atrial Fibrillation ◽  
New Onset
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