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Association between population mean and distribution of deviance in demographic surveys from 65 countries: cross sectional study
OBJECTIVES: To examine whether conditions related to scarcity at the left side of the distribution (anaemia, severe chronic energy deficiency, and underweight) are as strongly related to population means as conditions of excess at the right side of the distribution (overweight and obesity). DESIGN:...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
BMJ Publishing Group Ltd.
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6073428/ https://www.ncbi.nlm.nih.gov/pubmed/30076132 http://dx.doi.org/10.1136/bmj.k3147 |
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author | Razak, Fahad Subramanian, SV Sarma, Shohinee Kawachi, Ichiro Berkman, Lisa Davey Smith, George Corsi, Daniel J |
author_facet | Razak, Fahad Subramanian, SV Sarma, Shohinee Kawachi, Ichiro Berkman, Lisa Davey Smith, George Corsi, Daniel J |
author_sort | Razak, Fahad |
collection | PubMed |
description | OBJECTIVES: To examine whether conditions related to scarcity at the left side of the distribution (anaemia, severe chronic energy deficiency, and underweight) are as strongly related to population means as conditions of excess at the right side of the distribution (overweight and obesity). DESIGN: Observational study. SETTING: 65 countries, with nationally representative cross sectional data from 1994 to 2014 obtained from the Demographic Health Surveys. PARTICIPANTS: Non-pregnant women aged 20-49. Sample of 65 countries and n=524 380 for analysis of BMI; sample of 44 countries and n=316 465 for analysis of haemoglobin. MAIN OUTCOME MEASURES: The association between mean and prevalence of each category. For BMI, prevalence of severe chronic energy deficiency (SCED, BMI <16.0), underweight (BMI <18.5), overweight (BMI >25) and obese (BMI >30.) were measured; for haemoglobin, prevalence of anaemia (haemoglobin <12.0 g/dL) and severe anaemia (haemoglobin <8.0 g/dL) were examined. RESULTS: There was a strong association between mean BMI and prevalence of overweight (r(2)=0.98; r=0.99; β=8.3 (8.0 to 8.6)) and obesity (r(2)=0.93; r=0.97; β=4.2 (3.9 to 4.5)). For left sided conditions, a moderate to strong association was found between mean BMI and prevalence of underweight (r(2)=0.67; r=−0.82; β=−2.7 (−3.1 to −2.2)), and a weaker association for SCED (r(2)=0.38; r=−0.61; β=−0.32 (−0.43 to −0.22)). There was a moderate association between mean haemoglobin and prevalence of anaemia (r(2)=0.46; r=−0.68; β=−10.8 (−14.5 to −7.1)) and a weaker association with severe anaemia (r(2)=0.30; r=-0.55; β=−0.55 (−0.81 to −0.29)). CONCLUSIONS: The associations between population means and prevalence of conditions of scarcity such as low BMI and anaemia were substantially weaker than the associations of mean BMI with conditions of excesses such as overweight and obesity. |
format | Online Article Text |
id | pubmed-6073428 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | BMJ Publishing Group Ltd. |
record_format | MEDLINE/PubMed |
spelling | pubmed-60734282018-08-10 Association between population mean and distribution of deviance in demographic surveys from 65 countries: cross sectional study Razak, Fahad Subramanian, SV Sarma, Shohinee Kawachi, Ichiro Berkman, Lisa Davey Smith, George Corsi, Daniel J BMJ Research OBJECTIVES: To examine whether conditions related to scarcity at the left side of the distribution (anaemia, severe chronic energy deficiency, and underweight) are as strongly related to population means as conditions of excess at the right side of the distribution (overweight and obesity). DESIGN: Observational study. SETTING: 65 countries, with nationally representative cross sectional data from 1994 to 2014 obtained from the Demographic Health Surveys. PARTICIPANTS: Non-pregnant women aged 20-49. Sample of 65 countries and n=524 380 for analysis of BMI; sample of 44 countries and n=316 465 for analysis of haemoglobin. MAIN OUTCOME MEASURES: The association between mean and prevalence of each category. For BMI, prevalence of severe chronic energy deficiency (SCED, BMI <16.0), underweight (BMI <18.5), overweight (BMI >25) and obese (BMI >30.) were measured; for haemoglobin, prevalence of anaemia (haemoglobin <12.0 g/dL) and severe anaemia (haemoglobin <8.0 g/dL) were examined. RESULTS: There was a strong association between mean BMI and prevalence of overweight (r(2)=0.98; r=0.99; β=8.3 (8.0 to 8.6)) and obesity (r(2)=0.93; r=0.97; β=4.2 (3.9 to 4.5)). For left sided conditions, a moderate to strong association was found between mean BMI and prevalence of underweight (r(2)=0.67; r=−0.82; β=−2.7 (−3.1 to −2.2)), and a weaker association for SCED (r(2)=0.38; r=−0.61; β=−0.32 (−0.43 to −0.22)). There was a moderate association between mean haemoglobin and prevalence of anaemia (r(2)=0.46; r=−0.68; β=−10.8 (−14.5 to −7.1)) and a weaker association with severe anaemia (r(2)=0.30; r=-0.55; β=−0.55 (−0.81 to −0.29)). CONCLUSIONS: The associations between population means and prevalence of conditions of scarcity such as low BMI and anaemia were substantially weaker than the associations of mean BMI with conditions of excesses such as overweight and obesity. BMJ Publishing Group Ltd. 2018-08-03 /pmc/articles/PMC6073428/ /pubmed/30076132 http://dx.doi.org/10.1136/bmj.k3147 Text en Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions This is an Open Access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/. |
spellingShingle | Research Razak, Fahad Subramanian, SV Sarma, Shohinee Kawachi, Ichiro Berkman, Lisa Davey Smith, George Corsi, Daniel J Association between population mean and distribution of deviance in demographic surveys from 65 countries: cross sectional study |
title | Association between population mean and distribution of deviance in demographic surveys from 65 countries: cross sectional study |
title_full | Association between population mean and distribution of deviance in demographic surveys from 65 countries: cross sectional study |
title_fullStr | Association between population mean and distribution of deviance in demographic surveys from 65 countries: cross sectional study |
title_full_unstemmed | Association between population mean and distribution of deviance in demographic surveys from 65 countries: cross sectional study |
title_short | Association between population mean and distribution of deviance in demographic surveys from 65 countries: cross sectional study |
title_sort | association between population mean and distribution of deviance in demographic surveys from 65 countries: cross sectional study |
topic | Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6073428/ https://www.ncbi.nlm.nih.gov/pubmed/30076132 http://dx.doi.org/10.1136/bmj.k3147 |
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