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- Micklesfield, Lisa K, et al.
(författare)
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Physical activity and sedentary behavior among adolescents in rural South Africa : levels, patterns and correlates
- 2014
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Ingår i: BMC Public Health. - : Springer Science and Business Media LLC. - 1471-2458. ; 14, s. 40-
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Tidskriftsartikel (refereegranskat)abstract
- Background: Physical inactivity is increasing among children and adolescents and may be contributing to the increasing prevalence of overweight and obesity. This study examines physical activity and sedentary behavior patterns, and explores associations with individual, maternal, household, and community factors amongst rural South African adolescents.Methods: In 2009, 381 subjects, stratified by ages 11-12-years and 14-15-years, were randomly selected from 3511 children and adolescents who had participated in a growth survey two years previously. Weight and height were measured and self-reported Tanner pubertal stage was collected. A questionnaire quantifying frequency and duration of physical activity (PA) domains and sedentary time for the previous 12 months was administered. Moderate-vigorous physical activity (MVPA mins/wk) was calculated for time spent in school and club sport. Socio-demographic and other related data were included from the Agincourt health and socio-demographic system (HDSS). The Agincourt HDSS was established in 1992 and collects prospective data on the community living in the Agincourt sub-district of Mpumalanga Province in rural north-east South Africa.Results: Puberty, maternal education and socio-economic status (SES) contributed significantly to the mulitiple linear regression model for sedentary behavior (R-2=0.199; adjusted R-2=0.139; p < 0.000), and sex, SES and maternal education contributed to the tobit regression model for school and club sport MVPA (p < 0.000). MVPA, calculated from school and club sport, was higher in boys than girls (p < 0.001), and informal activity was lower (boys: p < 0.05 and girls: p < 0.01) while sedentary time was higher (girls: p < 0.01) in the older than the younger groups. Ninety-two percent (92%) of the sample reported walking for transport.Conclusions: In this study of rural South African adolescent boys and girls, SES at the maternal, household and community level independently predicted time spent in sedentary behaviors, and school and club MVPA. This study provides local data that can be used to develop health promotion strategies specific to this community, and other similar communities in developing countries.
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| 2. |
- Pisa, Pedro T., et al.
(författare)
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Nutrient Patterns and Their Association with Socio-Demographic, Lifestyle Factors and Obesity Risk in Rural South African Adolescents
- 2015
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Ingår i: Nutrients. - : MDPI AG. - 2072-6643. ; 7:5, s. 3464-3482
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Tidskriftsartikel (refereegranskat)abstract
- The aim of this study was to identify and describe the diversity of nutrient patterns and how they associate with socio-demographic and lifestyle factors including body mass index in rural black South African adolescents. Nutrient patterns were identified from quantified food frequency questionnaires (QFFQ) in 388 rural South African adolescents between the ages of 11-15 years from the Agincourt Health and Socio-demographic Surveillance System (AHDSS). Principle Component Analysis (PCA) was applied to 25 nutrients derived from QFFQs. Multiple linear regression and partial R-2 models were fitted and computed respectively for each of the retained principal component (PC) scores on socio-demographic and lifestyle characteristics including body mass index (BMI) for age Z scores. Four nutrient patterns explaining 79% of the total variance were identified: PCI (26%) was characterized by animal derived nutrients; PC2 (21%) by vitamins, fibre and vegetable oil nutrients; PC3 (19%) by both animal and plant derived nutrients (mixed diet driven nutrients); and PC4 (13%) by starch and folate. A positive and significant association was observed with BMI for age Z scores per 1 standard deviation (SD) increase in PC1 (0.13 (0.02; 0.24); p = 0.02) and PC4 (0.10 (-0.01; 0.21); p = 0.05) scores only. We confirmed variability in nutrient patterns that were significantly associated with various lifestyle factors including obesity.
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| 3. |
- Kimani-Murage, Elizabeth W., et al.
(författare)
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Nutritional status and HIV in rural South African children
- 2011
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Ingår i: BMC Pediatrics. - : Springer Science and Business Media LLC. - 1471-2431. ; 11
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Tidskriftsartikel (refereegranskat)abstract
- Background: Achieving the Millennium Development Goals that aim to reduce malnutrition and child mortality depends in part on the ability of governments/policymakers to address nutritional status of children in general and those infected or affected by HIV/AIDS in particular. This study describes HIV prevalence in children, patterns of malnutrition by HIV status and determinants of nutritional status.Methods: The study involved 671 children aged 12-59 months living in the Agincourt sub-district, rural South Africa in 2007. Anthropometric measurements were taken and HIV testing with disclosure was done using two rapid tests. Z-scores were generated using WHO 2006 standards as indicators of nutritional status. Linear and logistic regression analyses were conducted to establish the determinants of child nutritonal status.Results: Prevalence of malnutrition, particularly stunting (18%), was high in the overall sample of children. HIV prevalence in this age group was 4.4% (95% CI: 2.79 to 5.97). HIV positive children had significantly poorer nutritional outcomes than their HIV negative counterparts. Besides HIV status, other significant determinants of nutritional outcomes included age of the child, birth weight, maternal age, age of household head, and area of residence.Conclusions: This study documents poor nutritional status among children aged 12-59 months in rural South Africa. HIV is an independent modifiable risk factor for poor nutritional outcomes and makes a significant contribution to nutritional outcomes at the individual level. Early paediatric HIV testing of exposed or at risk children, followed by appropriate health care for infected children, may improve their nutritional status and survival.
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| 4. |
- Kimani-Murage, Elizabeth W., et al.
(författare)
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Predictors of adolescent weight status and central obesity in rural South Africa
- 2011
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Ingår i: Public Health Nutrition. - 1368-9800 .- 1475-2727. ; 14:6, s. 1114-1122
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Tidskriftsartikel (refereegranskat)abstract
- Objective: To investigate predictors of adolescent obesity in rural South Africa. Design: Cross-sectional study. Height, weight and waist circumference were measured using standard procedures. Overweight and obesity in adolescents aged 10-17 years were assessed using the International Obesity Taskforce cut-offs, while the WHO adult cut-offs were used for participants aged 18-20 years. Waist-to-height ratio of >0.5 defined central obesity in those at Tanner stages 3-5. Linear and logistic regression analysis was used to evaluate risk factors. Setting: Agincourt sub-district, rural South Africa. Subjects: Participants (n 1848) were aged 10-20 years. Results: Combined overweight and obesity was higher in girls (15%) than boys (4%), as was central obesity (15% and 2%, respectively). With regard to overweight/obesity, fourfold higher odds were observed for girls and twofold higher odds were observed for participants from households with the highest socio-economic status (SES). The odds for overweight/obesity were 40% lower if the household head had not completed secondary level education. For central obesity, the odds increased 10% for each unit increase in age; girls had sevenfold higher odds v. boys; postpubertal participants had threefold higher odds v. pubertal participants; those with older mothers aged 501 years had twofold higher odds v. those whose mothers were aged 35-49 years; those in highest SES households had twofold higher odds v. those in lowest SES households. Conclusions: In rural South Africa, adolescent females are most at risk of obesity which increases with age and appears to be associated with higher SES. To intervene effectively, it is essential to understand how household factors influence food choice, diet and exercise.
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| 5. |
- Kimani-Murage, Elizabeth W, et al.
(författare)
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The prevalence of stunting, overweight and obesity, and metabolic disease risk in rural South African children
- 2010
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Ingår i: BMC Public Health. - : Springer Science and Business Media LLC. - 1471-2458. ; 10, s. 158-
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Tidskriftsartikel (refereegranskat)abstract
- The study highlights that in transitional societies, early stunting and adolescent obesity may co-exist in the same socio-geographic population. It is likely that this profile relates to changes in nutrition and diet, but variation in factors such as infectious disease burden and physical activity patterns, as well as social influences, need to be investigated. As obesity and adult short stature are risk factors for metabolic syndrome and Type 2 diabetes, this combination of early stunting and adolescent obesity may be an explosive combination.
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