Waist circumference percentiles of black South African children aged 10 - 14 years from different study sites

Background. Waist circumference (WC) is a useful predictor of cardiometabolic risk in children. Published data on WC percentiles of children from African countries are limited.Objectives. To describe age- and sex-specific Wpercentiles in black South African (SA) children from different study sites, and compare these percentiles with median WCpercentiles of African-American (AA) children.Methods. Secondary data on WC for 10 - 14-year-old black SA children (N=4 954; 2 406 boys and 2 548 girls) were extracted from the data sets of six studies. Smoothed WC percentile curves for boys and girls were constructed using the LMS method. The 50th percentile for age- and sex-specific WC measurements was compared across study sites and with AA counterparts.Results. Girls had higher WC values than boys from the 50th to 95th percentiles at all ages. The 50th WC percentiles of all groups of SA children combined were lower than those of AA children. When SA groups were considered separately, Western Cape children had median WC values similar to AA children, while rural Limpopo children had the lowest WC values. The 95th percentiles for Western Cape girls exceeded the adult cutoff point for metabolic syndrome (WC ≥80 cm) from age 11years.Conclusions. The differences in WC values for 10 - 14-year-old children across the six study sites highlight the need for nationally representative data to develop age-, sex- and ethnic-specific WC percentiles for black SA children. The results raise concerns about high WC among Western Cape girls

Results from the healthy active kids South Africa 2018 report card

Background. Healthy Active Kids South Africa (HAKSA) Report Cards were produced in 2007, 2010, 2014 and 2016. Objective. The 2018 Report Card aims to report on the latest available evidence relating to the physical activity (PA), nutrition and body composition of South African (SA) children and adolescents. Methods. A review was conducted using the following databases: PubMed; Africa Journals Online; and Africa-Wide (EBSCOhost). Articles published from January 2016 to September 2018 were included for review by the HAKSA scientific advisory group. Data were extracted, and a grade for each indicator was assigned based on the available evidence and the consensus of the scientific advisory group. This included 12 PA indicators, 6 nutrition indicators and 3 body composition indicators. Results. There was no evidence of a significant change in any of the indicators since the 2016 Report Card. Grades for certain indicators have been downgraded (from 2016) to bring these to the attention of relevant stakeholders and industry. These include food insecurity and grades that relate to the implementation of policy on PA and nutrition in the school environment, and on advertising and media relating to nutrition. Conclusion. Key priorities for action include: safe opportunities for physical activity; minimising the gap between policy and implementation (school culture and environment, and government strategies); and the double burden of over- and undernutrition, which relates to the continuing concern about food insecurity in SA. There is a need for further research, including surveillance, on all indicators, for future Report Cards

Differences between bone mineral density, lean and fat mass of HIV-positive and HIV-negative black women

Objectives: To investigate the differences between bone mineral density (BMD), lean and fat mass of human immunodeficiency virus (HIV-) positive and HIV-negative black women and to investigate factors associated with low BMD. Methods: Case-control study of black women (n= 565) aged 29­65 years from Potchefstroom, North West province, South Africa, based on secondary analysis of data. Total BMD, left femur neck of the hip (LFN BMD), spine BMD, total fat, fat-free tissue mass and percentage body fat (%BF) were measured by dual-energy X-ray absorptiometry. Results: HIV-negative women had significantly higher median BMD, %BF, appendicular skeletal mass (ASM), ASM index, body mass index (BMI) and waist circumference than HIV-positive women. When the groups were matched for age and BMI, only spine BMD was marginally lower in HIV-positive women. In the total group, age, smoking and HIV status were associated with lower BMD, while calcium intake was positively associated with BMD. Similar variables were associated with BMD in HIV-negative women, while age and educational status were associated with BMD in HIV-positive women. Conclusion: Low BMD was more common among HIV-positive than HIV-negative women. Older HIV-positive women with low educational status are particularly at risk

Significant Differences between Serum CRP Levels in Children in Different Categories of Physical Activity : the PLAY Study : Cardiovascular Topics

Low-grade systemic inflammation is emerging as a component of the metabolic syndrome. The purpose of this study was to assess the association between serum C-reactive protein (CRP); physical activity and body composition in 193 black children aged 13 to 18 years from a South African township. Demographic information and anthropometric measurements were taken; and fasting blood samples were analysed for high-sensitivity serum CRP. Body fat was measured by air displacement plethysmography. There was a trend towards higher serum CRP in the boys with a higher percentage body fat. After multiple regression analyses; waist circumference in the girls was significantly associated with serum CRP. In the boys; there was an inverse correlation between percentage body fat and fitness; and between fitness and serum CRP. Significant differences were found between serum CRP in the different physical activity categories; with lower serum CRP in the girls in the higher physical activity group. Obesity should be prevented in South African children by encouraging physical activity

Factors Affecting Mothers' Choice Ofbreastfeeding Vs. Formula Feeding in the Lower Umfolozi District War Memorial Hospital; Kwazulu-Natal

The aim of this study was to determine which factors influence choice of breast- versus the formulafeeding of infants. This may help to understand where the focus should lie in the promotion of breastfeeding. A structured questionnaire was completed by a 100 women and focus-group discussions were held with 22 women who delivered babies at the Lower Umfolozi District War Memorial Hospital (LUDWM) in Kwazulu-Natal. Most of the mothers (72) chose breastfeeding and 58intended to breastfeed for only 6 months. One-third (33) were influenced by health care professionals and 44of the mothers made their own decisions in their feeding method. Only one participant stated that she chose formula-feeding due to her HIV-positive status; but in the focusgroup discussions; the fear of transmission of HIV through breast-milk was stated as an important reason why mothers chose replacement-feeding. Significantly more HIV-infected than uninfected mothers chose replacement-feeding as the feeding method and mothers who chose breastfeeding were significantly older than mothers who selected replacement-feeding. They made their infantfeeding decision earlier than those who chose replacement-feeding. Findings showed that the majority of women in this study did not have access to running water and flush toilets in their houses. In these areas where replacement-feeding will not be acceptable; feasible; affordable; sustainable and safe; due to lack of sanitation and poor socio-economic status; health professionals should promote exclusive breastfeeding for 6 months; even though there is a high prevalence of HIV infection