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A proposed cutoff point of waist-to-height ratio for metabolic risk in African township adolescents

Abstract Objective A waist:height ratio (WHtR) higher than 0.5 has been proposed as a cutoff point for abdominal obesity in both sexes and at all ages. It is unknown if this cutoff point is appropriate for previously undernourished adolescents. We assessed the cutoff value of the WHtR associated wit... Full description

Journal Title: Nutrition (Burbank Los Angeles County, Calif.), 2013, Vol.29 (3), p.502-507
Main Author: Kruger, H. Salome, Ph.D
Other Authors: Faber, Mieke, Ph.D , Schutte, Aletta E., Ph.D , Ellis, Suria M., Ph.D
Format: Electronic Article Electronic Article
Language: English
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Quelle: Alma/SFX Local Collection
Publisher: New York, NY: Elsevier Inc
ID: ISSN: 0899-9007
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title: A proposed cutoff point of waist-to-height ratio for metabolic risk in African township adolescents
format: Article
creator:
  • Kruger, H. Salome, Ph.D
  • Faber, Mieke, Ph.D
  • Schutte, Aletta E., Ph.D
  • Ellis, Suria M., Ph.D
subjects:
  • Adolescent
  • African Continental Ancestry Group
  • Biological and medical sciences
  • Blood Glucose - analysis
  • Blood Pressure
  • Body Height
  • Body Mass Index
  • C-Reactive Protein
  • Children
  • Cholesterol
  • Diet
  • Fasting
  • Feeding. Feeding behavior
  • Female
  • Fundamental and applied biological sciences. Psychology
  • Gastroenterology and Hepatology
  • Humans
  • Hypertension
  • Insulin Resistance
  • Male
  • Malnutrition
  • Medical sciences
  • Metabolic diseases
  • Metabolic syndrome
  • Metabolic Syndrome - diagnosis
  • Miscellaneous
  • Obesity
  • Other metabolic disorders
  • Reference Values
  • Sensitivity and Specificity
  • South Africa
  • South African
  • Stunting
  • Teenagers
  • Vertebrates: anatomy and physiology, studies on body, several organs or systems
  • Waist Circumference
  • Youth
ispartof: Nutrition (Burbank, Los Angeles County, Calif.), 2013, Vol.29 (3), p.502-507
description: Abstract Objective A waist:height ratio (WHtR) higher than 0.5 has been proposed as a cutoff point for abdominal obesity in both sexes and at all ages. It is unknown if this cutoff point is appropriate for previously undernourished adolescents. We assessed the cutoff value of the WHtR associated with an increased metabolic risk in 178 black South African 14- to 18-y-old adolescents (69 boys, 109 girls). Methods We measured weight, height, waist circumference, fasting plasma glucose and insulin levels, serum high-sensitivity C-reactive protein, and blood pressure and calculated the WHtR and homeostasis model assessment of insulin resistance (HOMA-IR). Using receiver operating characteristics curve analyses, we assessed the WHtR with the highest sensitivity and specificity to discriminate adolescents with increased fasting plasma glucose, HOMA-IR, serum high-sensitivity C-reactive protein, and blood pressure from those with “normal” values. Results The WHtR cutoff points derived from the receiver operating characteristics curves ranged from 0.40 to 0.41, with best diagnostic value at 0.41. A WHtR of 0.40 had 80% sensitivity and 38.5% specificity to classify adolescents with fasting blood glucose level higher than 5.6 mmol/L (area under the curve [AUC] 0.57). A WHtR of 0.41 had 64% sensitivity and 58.5% specificity for a HOMA-IR higher than 3.4 (AUC 0.66), 55% sensitivity and 55.6% specificity for a high-sensitivity C-reactive protein level higher than 1 mg/L (AUC 0.57), and 64% sensitivity and 50.2% specificity for a blood pressure higher than the age-, sex-, and height-specific 90th percentiles (AUC 0.56). Adolescents with a WHtR higher than 0.41 had an odds ratio of 2.46 (95% confidence interval 0.96–6.30) for having a HOMA-IR higher than 3.4. Conclusion The WHtR cutoff to indicate metabolic risk for black South African adolescents is 0.41, which is lower than the proposed international cutoff of 0.5. The WHtR can be used for screening adolescents with components of the metabolic syndrome in intervention programs.
language: eng
source: Alma/SFX Local Collection
identifier: ISSN: 0899-9007
fulltext: fulltext
issn:
  • 0899-9007
  • 1873-1244
url: Link


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titleA proposed cutoff point of waist-to-height ratio for metabolic risk in African township adolescents
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creatorKruger, H. Salome, Ph.D ; Faber, Mieke, Ph.D ; Schutte, Aletta E., Ph.D ; Ellis, Suria M., Ph.D
creatorcontribKruger, H. Salome, Ph.D ; Faber, Mieke, Ph.D ; Schutte, Aletta E., Ph.D ; Ellis, Suria M., Ph.D
descriptionAbstract Objective A waist:height ratio (WHtR) higher than 0.5 has been proposed as a cutoff point for abdominal obesity in both sexes and at all ages. It is unknown if this cutoff point is appropriate for previously undernourished adolescents. We assessed the cutoff value of the WHtR associated with an increased metabolic risk in 178 black South African 14- to 18-y-old adolescents (69 boys, 109 girls). Methods We measured weight, height, waist circumference, fasting plasma glucose and insulin levels, serum high-sensitivity C-reactive protein, and blood pressure and calculated the WHtR and homeostasis model assessment of insulin resistance (HOMA-IR). Using receiver operating characteristics curve analyses, we assessed the WHtR with the highest sensitivity and specificity to discriminate adolescents with increased fasting plasma glucose, HOMA-IR, serum high-sensitivity C-reactive protein, and blood pressure from those with “normal” values. Results The WHtR cutoff points derived from the receiver operating characteristics curves ranged from 0.40 to 0.41, with best diagnostic value at 0.41. A WHtR of 0.40 had 80% sensitivity and 38.5% specificity to classify adolescents with fasting blood glucose level higher than 5.6 mmol/L (area under the curve [AUC] 0.57). A WHtR of 0.41 had 64% sensitivity and 58.5% specificity for a HOMA-IR higher than 3.4 (AUC 0.66), 55% sensitivity and 55.6% specificity for a high-sensitivity C-reactive protein level higher than 1 mg/L (AUC 0.57), and 64% sensitivity and 50.2% specificity for a blood pressure higher than the age-, sex-, and height-specific 90th percentiles (AUC 0.56). Adolescents with a WHtR higher than 0.41 had an odds ratio of 2.46 (95% confidence interval 0.96–6.30) for having a HOMA-IR higher than 3.4. Conclusion The WHtR cutoff to indicate metabolic risk for black South African adolescents is 0.41, which is lower than the proposed international cutoff of 0.5. The WHtR can be used for screening adolescents with components of the metabolic syndrome in intervention programs.
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subjectAdolescent ; African Continental Ancestry Group ; Biological and medical sciences ; Blood Glucose - analysis ; Blood Pressure ; Body Height ; Body Mass Index ; C-Reactive Protein ; Children ; Cholesterol ; Diet ; Fasting ; Feeding. Feeding behavior ; Female ; Fundamental and applied biological sciences. Psychology ; Gastroenterology and Hepatology ; Humans ; Hypertension ; Insulin Resistance ; Male ; Malnutrition ; Medical sciences ; Metabolic diseases ; Metabolic syndrome ; Metabolic Syndrome - diagnosis ; Miscellaneous ; Obesity ; Other metabolic disorders ; Reference Values ; Sensitivity and Specificity ; South Africa ; South African ; Stunting ; Teenagers ; Vertebrates: anatomy and physiology, studies on body, several organs or systems ; Waist Circumference ; Youth
ispartofNutrition (Burbank, Los Angeles County, Calif.), 2013, Vol.29 (3), p.502-507
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descriptionAbstract Objective A waist:height ratio (WHtR) higher than 0.5 has been proposed as a cutoff point for abdominal obesity in both sexes and at all ages. It is unknown if this cutoff point is appropriate for previously undernourished adolescents. We assessed the cutoff value of the WHtR associated with an increased metabolic risk in 178 black South African 14- to 18-y-old adolescents (69 boys, 109 girls). Methods We measured weight, height, waist circumference, fasting plasma glucose and insulin levels, serum high-sensitivity C-reactive protein, and blood pressure and calculated the WHtR and homeostasis model assessment of insulin resistance (HOMA-IR). Using receiver operating characteristics curve analyses, we assessed the WHtR with the highest sensitivity and specificity to discriminate adolescents with increased fasting plasma glucose, HOMA-IR, serum high-sensitivity C-reactive protein, and blood pressure from those with “normal” values. Results The WHtR cutoff points derived from the receiver operating characteristics curves ranged from 0.40 to 0.41, with best diagnostic value at 0.41. A WHtR of 0.40 had 80% sensitivity and 38.5% specificity to classify adolescents with fasting blood glucose level higher than 5.6 mmol/L (area under the curve [AUC] 0.57). A WHtR of 0.41 had 64% sensitivity and 58.5% specificity for a HOMA-IR higher than 3.4 (AUC 0.66), 55% sensitivity and 55.6% specificity for a high-sensitivity C-reactive protein level higher than 1 mg/L (AUC 0.57), and 64% sensitivity and 50.2% specificity for a blood pressure higher than the age-, sex-, and height-specific 90th percentiles (AUC 0.56). Adolescents with a WHtR higher than 0.41 had an odds ratio of 2.46 (95% confidence interval 0.96–6.30) for having a HOMA-IR higher than 3.4. Conclusion The WHtR cutoff to indicate metabolic risk for black South African adolescents is 0.41, which is lower than the proposed international cutoff of 0.5. The WHtR can be used for screening adolescents with components of the metabolic syndrome in intervention programs.
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32Stunting
33Teenagers
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35Waist Circumference
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titleA proposed cutoff point of waist-to-height ratio for metabolic risk in African township adolescents
authorKruger, H. Salome, Ph.D ; Faber, Mieke, Ph.D ; Schutte, Aletta E., Ph.D ; Ellis, Suria M., Ph.D
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1African Continental Ancestry Group
2Biological and medical sciences
3Blood Glucose - analysis
4Blood Pressure
5Body Height
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7C-Reactive Protein
8Children
9Cholesterol
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12Feeding. Feeding behavior
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atitleA proposed cutoff point of waist-to-height ratio for metabolic risk in African township adolescents
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abstractAbstract Objective A waist:height ratio (WHtR) higher than 0.5 has been proposed as a cutoff point for abdominal obesity in both sexes and at all ages. It is unknown if this cutoff point is appropriate for previously undernourished adolescents. We assessed the cutoff value of the WHtR associated with an increased metabolic risk in 178 black South African 14- to 18-y-old adolescents (69 boys, 109 girls). Methods We measured weight, height, waist circumference, fasting plasma glucose and insulin levels, serum high-sensitivity C-reactive protein, and blood pressure and calculated the WHtR and homeostasis model assessment of insulin resistance (HOMA-IR). Using receiver operating characteristics curve analyses, we assessed the WHtR with the highest sensitivity and specificity to discriminate adolescents with increased fasting plasma glucose, HOMA-IR, serum high-sensitivity C-reactive protein, and blood pressure from those with “normal” values. Results The WHtR cutoff points derived from the receiver operating characteristics curves ranged from 0.40 to 0.41, with best diagnostic value at 0.41. A WHtR of 0.40 had 80% sensitivity and 38.5% specificity to classify adolescents with fasting blood glucose level higher than 5.6 mmol/L (area under the curve [AUC] 0.57). A WHtR of 0.41 had 64% sensitivity and 58.5% specificity for a HOMA-IR higher than 3.4 (AUC 0.66), 55% sensitivity and 55.6% specificity for a high-sensitivity C-reactive protein level higher than 1 mg/L (AUC 0.57), and 64% sensitivity and 50.2% specificity for a blood pressure higher than the age-, sex-, and height-specific 90th percentiles (AUC 0.56). Adolescents with a WHtR higher than 0.41 had an odds ratio of 2.46 (95% confidence interval 0.96–6.30) for having a HOMA-IR higher than 3.4. Conclusion The WHtR cutoff to indicate metabolic risk for black South African adolescents is 0.41, which is lower than the proposed international cutoff of 0.5. The WHtR can be used for screening adolescents with components of the metabolic syndrome in intervention programs.
copNew York, NY
pubElsevier Inc
pmid23274093
doi10.1016/j.nut.2012.08.009