Publications by authors named "Anniza de Villiers"

Article Synopsis
  • The study investigates the feasibility of a time-restricted eating (TRE) intervention for women aged 20-45 living with both HIV and overweight/obesity in Cape Town, South Africa, to combat the weight gain associated with anti-retroviral treatment, specifically dolutegravir (DTG).
  • Factors influencing the adoption of TRE were identified, including psychological capability, social influences, and reflective motivation, utilizing models like the Capability, Opportunity, Motivation - Behaviour framework and Theoretical Domains Framework through interviews and a pilot trial.
  • In a 4-week pilot trial with 12 participants, retention was 100%, and positive outcomes included improved energy levels, appetite control, and weight loss, indicating that TRE was seen as an acceptable
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Background: Previous research has shown that Black South African (SA) women perceive a bigger body size to be acceptable and desirable, but nonetheless have shown interest in participating in community-based exercise programmes. This study aimed to investigate perceptions and experiences of participating in a 12-week exercise intervention designed to study the mechanisms of insulin sensitivity and secretion in young Black SA women with obesity.

Methods: Qualitative data was collected from young (23 ± 2.

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Leukocyte Telomere length (LTL) is an independent predictor of cardio-metabolic diseases (CMDs) and Human Immuno Virus (HIV) infection. However, studies are lacking on the association between LTL with CMD profile in people with HIV. Accordingly, we investigated the association between LTL and CMD profile in HIV-infected adult South Africans.

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To address the issue of obesity, the World Health Organization (WHO) recommends a set of comprehensive programmes aimed at changing the obesogenic environments to provide opportunities for healthy food options and increased physical activity in the school, home, and at the population level. The objectives of this study were to examine the nature and range of policies related to overweight and obesity prevention in Africa, and to assess how they align with international guidelines. An existing methodological framework was adapted for this scoping review.

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South Africa has a high prevalence of obesity in black female adolescents and a paucity of knowledge regarding contributing dietary practices. The aim of this study was to assess the dietary practices and weight status of male and female adolescents at secondary schools in the Eastern Cape province in urban and rural areas. Sixteen schools and grade 8-12 learners (N = 1360) were randomly selected from three health districts comprising poor disadvantaged communities.

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Aim: The increasing burden of comorbid HIV infection and hypertension necessitates a focus on healthcare services providing care for chronic multi-morbidities. The aim of this study was to evaluate the perceptions and experiences of 1) people living with HIV infection and comorbid hypertension, and 2) their healthcare providers, related to their diagnoses and interactions with chronic healthcare services in South Africa.

Methods: This study comprised quantitative and qualitative arms with a multi-layered approach.

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Overweight and obesity are growing concerns in adolescents, particularly in females in South Africa. The aim of this study was to evaluate the food and nutrition environment in terms of government policy programs, nutrition education provided, and foods sold at secondary schools in the Eastern Cape province. Sixteen schools and grade 8-12 learners ( = 1360) were randomly selected from three health districts comprising poor disadvantaged communities.

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Background: In human immunodeficiency virus (HIV)-infected individuals, smoking increases both HIV-related and non-related negative health outcomes.

Objectives: To determine the prevalence and associations of smoking in HIV-infected adults receiving antiretroviral therapy at public healthcare facilities in the Western Cape province, South Africa.

Methods: Participants comprised 827 HIV-infected patients, who were > 18 years old and randomly selected from 17 HIV healthcare facilities.

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Background: Overweight/obesity is an emerging health concern among African children. The aim of this study was to summarise available evidence from school-based interventions that focused on improving nutrition and physical activity knowledge, attitude, and behaviours, and weight status of children aged 6-15 years in the African context.

Methods: Multiple databases were searched for studies evaluating school-based interventions of African origin that involved diet alone, physical activity alone, or multicomponent interventions, for at least 12 weeks in duration, reporting changes in either diet, physical activity, or body composition, and published between 1 January 2000 and 31 December 2018.

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Background: Screening methods for childhood obesity are based largely on the published body mass index (BMI) criteria. Nonetheless, their accuracy in African children is largely unknown. The diagnostic accuracies of the World Health Organization (WHO), the Centers for Disease Control and Prevention (CDC), and the International Obesity Taskforce (IOTF) BMI-based criteria in defining obesity using deuterium dilution as a criterion method in a sample of Ghanaian children are presented.

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Background: Little is known about the impact of the school environmental context on the emerging trend of childhood obesity in Africa. We examined the association of the schools' contextual factors with body mass index (BMI), abdominal obesity and overweight (including obesity) in urban Ghana.

Method: Using cross-sectional data from 543 school children aged 8-11 years attending 14 primary schools, we applied multilevel logistic regressions and linear regression models to investigate the association of child- and school level attributes with overweight, abdominal obesity, and BMI.

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Background: There is limited data on risk factors associated with childhood overweight and obesity in Ghanaian school children. Therefore, the aim of this study was to assess the prevalence of overweight and obesity and associated risk factors in Ghanaian school children.

Methods: Data for this study were obtained from a cross-sectional survey of 543 children aged 8 and 11 years, attending private and public primary schools in the Adentan Municipality of Greater Accra Region, Ghana.

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Background: Glycated haemoglobin (HbA1c) test has been increasingly promoted as an alternative to fasting plasma glucose (FPG) or oral glucose tolerance test (OGTT) to diagnose dysglycaemia but its performance in HIV-infected Africans has yet to be established. This study aimed to assess the diagnostic accuracy of HbA1c for dysglycaemia including FPG-defined and OGTT-defined dysglycaemia, and OGTT-defined diabetes in HIV-infected Africans, and the effect of HbA1c-predicted dysglycaemia on Joint Interim Statement (JIS)-based prevalent metabolic syndrome (MS).

Methods: A cross-sectional study included HIV-positive patients recruited across public healthcare facilities in the Western Cape.

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Objective: To assess type, nutrient profile and cost of food items sold by informal vendors to learners; and to determine nutrient content of corn-based processed snacks frequently sold.

Design: Cross-sectional survey.

Setting: Quintile 1 to 3 schools (n 36) randomly selected from six education districts; Eastern Cape, South Africa.

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Article Synopsis
  • * Using data from 354 adults aged 35 and older, the researchers found that those who felt traffic was slow were less likely to be overweight/obese, while those who felt unsafe due to crime were more likely to be overweight/obese.
  • * The results indicated that these associations were particularly strong in women, highlighting the importance of creating safer neighborhoods to encourage physical activity and ultimately address obesity.
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Aims: To describe the distribution and examine the associations of diabetes, hypertension and hypercholesterolaemia across and within population groups, gender and body mass index (BMI) categories.

Methods: This national cross-sectional study was conducted in 2013 among ≥18-year-old black African, coloured, white and Indian adults self-selected for screening. Data collection included self-reported behavioural risk factors and clinical measurements comprising blood pressure, anthropometry and point-of-care random blood glucose and cholesterol assessments.

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Representative data on the prevalence of hypertension, a major non-infectious comorbidity in human immunodeficiency virus (HIV)-infected people, is lacking. We assessed the prevalence, awareness, treatment, and control, as well as determinants of hypertension in HIV-infected adults in South Africa.A cross-sectional survey was conducted between March 2014 and February 2015 in a random sample of 827 adults (77.

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Article Synopsis
  • The study investigates how the built environment (like community and shopping centers) affects health metrics like body mass index (BMI) and blood pressure in urban South Africans aged 35 and older.
  • Researchers used tracking devices and geographic data to measure physical activity and access to these facilities in 341 participants from the Cape Town area.
  • Findings suggest that greater distances from community and shopping centers are linked to higher BMI and blood pressure and lower levels of physical activity, highlighting the need for further research on the built environment's impact on health in African communities.
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Background: The HealthKick (HK) study showed that educators (teachers) had a high prevalence of risk factors for the development of non-communicable diseases (NCDs). Little data are available on parents or other primary caregivers of learners from disadvantaged schools.

Aim: The aim of our study was to determine modifiable risk factors for the development of NCDs in a sample of caregivers of schools included in the HK intervention program.

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Background: The pathogenesis of type 2 diabetes (T2D) in black African women is complex and differs from that in their white counterparts. However, earlier studies have been cross-sectional and provide little insight into the causal pathways. Exercise training is consistently used as a model to examine the mechanisms underlying insulin resistance and risk for T2D.

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The South African strategic plan to reduce cardiovascular disease (CVD) includes reducing population salt intake to less than 5 g/day. A mass media campaign was undertaken to increase public awareness of the association between high salt intake, blood pressure and CVD, and focused on the reduction of discretionary salt intake. Community based surveys, before and after the campaign, were conducted in a cohort of black women aged 18-55 years.

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Background: The applicability of the internationally advocated cut-off points of waist circumference (WC) derived from Caucasians to diagnose metabolic syndrome (MS) in HIV-infected Africans is unknown. This study aimed to determine the optimal WC cutoffs for MS diagnosis in HIV-infected people receiving care at public healthcare facilities in the Western Cape Province in South Africa.

Methods: Data from 748 randomly selected participants (591 women), with a median age of 38 years, were analysed.

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Background: To investigate the mediation effects of physical activity (PA) on the relationship between the perceived neighborhood aesthetic environment and overweight/obesity in free-living South Africans.

Methods: A cross-sectional study of 671 adults aged ≥ 35 years was analyzed. PA was assessed using the validated International Physical Activity Questionnaire.

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Introduction: The obesity epidemic is a public health challenge for all, including low-income countries. The behavioural patterns known to contribute to the rise in obesity prevalence occur in an environmental context which is not conducive for healthy choices. A policy approach to obesity prevention constitutes a form of public intervention in that it extends beyond individuals to influence entire populations and is a mechanism for creating healthier environments.

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