Is there an association between sleeping patterns and other environmental factors with obesity and blood pressure in an urban African population?

 

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dc.contributor.author Pretorius, Sandra en_ZA
dc.contributor.author Stewart, Simon en_ZA
dc.contributor.author Carrington, Melinda J en_ZA
dc.contributor.author Lamont, Kim en_ZA
dc.contributor.author Sliwa, Karen en_ZA
dc.contributor.author Crowther, Nigel J en_ZA
dc.date.accessioned 2015-11-11T14:26:55Z
dc.date.available 2015-11-11T14:26:55Z
dc.date.issued 2015 en_ZA
dc.identifier.citation Pretorius, S., Stewart, S., Carrington, M. J., Lamont, K., Sliwa, K., & Crowther, N. J. (2015). Is there an association between sleeping patterns and other environmental factors with obesity and blood pressure in an urban African population?. PloS one, 10(10), e0131081. doi:10.1371/journal.pone.0131081 en_ZA
dc.identifier.uri http://hdl.handle.net/11427/14919
dc.identifier.uri http://dx.doi.org/10.1371/journal.pone.0131081
dc.description.abstract Beyond changing dietary patterns, there is a paucity of data to fully explain the high prevalence of obesity and hypertension in urban African populations. The aim of this study was to determine whether other environmental factors (including sleep duration, smoking and physical activity) are related to body anthropometry and blood pressure (BP). Data were collected on 1311 subjects, attending two primary health care clinics in Soweto, South Africa. Questionnaires were used to obtain data on education, employment, exercise, smoking and sleep duration. Anthropometric and BP measurements were taken. Subjects comprised 862 women (mean age 41 ± 16 years and mean BMI 29.9 ± 9.2 kg/m 2 ) and 449 men (38 ± 14 years and 24.8 ± 8.3 kg/m 2 ). In females, ANOVA showed that former smokers had a higher BMI (p<0.001) than current smokers, while exposure to second hand smoking was associated with a lower BMI (p<0.001) in both genders. Regression analyses demonstrated that longer sleep duration was associated with a lower BMI (p<0.05) in older females only, and not in males, whilst in males napping during the day for > 30 minutes was related to a lower BMI (β = -0.04, p<0.01) and waist circumference (β = -0.03, p<0.001). Within males, napping for >30 minutes/day was related to lower systolic (β = -0.02, p<0.05) and lower diastolic BP (β = -0.02, p = 0.05). Longer night time sleep duration was associated with higher diastolic (β = 0.005, p<0.01) and systolic BP (β = 0.003, p<0.05) in females. No health benefits were noted for physical activity. These data suggest that environmental factors rarely collected in African populations are related, in gender-specific ways, to body anthropometry and blood pressure. Further research is required to fully elucidate these associations and how they might be translated into public health programs to combat high levels of obesity and hypertension. en_ZA
dc.language.iso eng en_ZA
dc.publisher Public Library of Science en_ZA
dc.rights This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. en_ZA
dc.rights.uri http://creativecommons.org/licenses/by/4.0 en_ZA
dc.source PLoS One en_ZA
dc.source.uri http://journals.plos.org/plosone en_ZA
dc.subject.other Sleep en_ZA
dc.subject.other Obesity en_ZA
dc.subject.other Hypertension en_ZA
dc.subject.other Anthropometry en_ZA
dc.title Is there an association between sleeping patterns and other environmental factors with obesity and blood pressure in an urban African population? en_ZA
dc.type Journal Article en_ZA
dc.rights.holder © 2015 Pretorius et al en_ZA
uct.type.publication Research en_ZA
uct.type.resource Article en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Health Sciences en_ZA
dc.publisher.department Division of Cardiology en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Pretorius, S., Stewart, S., Carrington, M. J., Lamont, K., Sliwa, K., & Crowther, N. J. (2015). Is there an association between sleeping patterns and other environmental factors with obesity and blood pressure in an urban African population?. <i>PLoS One</i>, http://hdl.handle.net/11427/14919 en_ZA
dc.identifier.chicagocitation Pretorius, Sandra, Simon Stewart, Melinda J Carrington, Kim Lamont, Karen Sliwa, and Nigel J Crowther "Is there an association between sleeping patterns and other environmental factors with obesity and blood pressure in an urban African population?." <i>PLoS One</i> (2015) http://hdl.handle.net/11427/14919 en_ZA
dc.identifier.vancouvercitation Pretorius S, Stewart S, Carrington MJ, Lamont K, Sliwa K, Crowther NJ. Is there an association between sleeping patterns and other environmental factors with obesity and blood pressure in an urban African population?. PLoS One. 2015; http://hdl.handle.net/11427/14919. en_ZA
dc.identifier.ris TY - Journal Article AU - Pretorius, Sandra AU - Stewart, Simon AU - Carrington, Melinda J AU - Lamont, Kim AU - Sliwa, Karen AU - Crowther, Nigel J AB - Beyond changing dietary patterns, there is a paucity of data to fully explain the high prevalence of obesity and hypertension in urban African populations. The aim of this study was to determine whether other environmental factors (including sleep duration, smoking and physical activity) are related to body anthropometry and blood pressure (BP). Data were collected on 1311 subjects, attending two primary health care clinics in Soweto, South Africa. Questionnaires were used to obtain data on education, employment, exercise, smoking and sleep duration. Anthropometric and BP measurements were taken. Subjects comprised 862 women (mean age 41 ± 16 years and mean BMI 29.9 ± 9.2 kg/m 2 ) and 449 men (38 ± 14 years and 24.8 ± 8.3 kg/m 2 ). In females, ANOVA showed that former smokers had a higher BMI (p<0.001) than current smokers, while exposure to second hand smoking was associated with a lower BMI (p<0.001) in both genders. Regression analyses demonstrated that longer sleep duration was associated with a lower BMI (p<0.05) in older females only, and not in males, whilst in males napping during the day for > 30 minutes was related to a lower BMI (β = -0.04, p<0.01) and waist circumference (β = -0.03, p<0.001). Within males, napping for >30 minutes/day was related to lower systolic (β = -0.02, p<0.05) and lower diastolic BP (β = -0.02, p = 0.05). Longer night time sleep duration was associated with higher diastolic (β = 0.005, p<0.01) and systolic BP (β = 0.003, p<0.05) in females. No health benefits were noted for physical activity. These data suggest that environmental factors rarely collected in African populations are related, in gender-specific ways, to body anthropometry and blood pressure. Further research is required to fully elucidate these associations and how they might be translated into public health programs to combat high levels of obesity and hypertension. DA - 2015 DB - OpenUCT DO - 10.1371/journal.pone.0131081 DP - University of Cape Town J1 - PLoS One LK - https://open.uct.ac.za PB - University of Cape Town PY - 2015 T1 - Is there an association between sleeping patterns and other environmental factors with obesity and blood pressure in an urban African population? TI - Is there an association between sleeping patterns and other environmental factors with obesity and blood pressure in an urban African population? UR - http://hdl.handle.net/11427/14919 ER - en_ZA


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This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Except where otherwise noted, this item's license is described as This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.