Debbi Marais

Debbi Marais

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Research Focus & Metrics

Academic Career Length

22Years (2005-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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17 October 2015 in Journal of Public Health
Verified
Journal Article
Open access
PDF file
OOOjochenemi J. Onubi
Ojochenemi J. Onubi
DMDebbi Marais
Debbi Marais
LALorna Aucott
Lorna Aucott
FOFriday Okonofua
Friday Okonofua
APAmudha S. Poobalan
Amudha S. Poobalan
Maternal obesity is emerging as a public health problem, recently highlighted together with maternal under-nutrition as a ‘double burden’, especially in African countries undergoing social and economic transition. This systematic review was conducted to investigate the current evidence on maternal obesity in Africa. MEDLINE, EMBASE, Scopus, CINAHL and PsycINFO were searched (up to August 2014) and identified 29 studies. Prevalence, associations with socio-demographic factors, labour, child and maternal consequences of maternal obesity were assessed. Pooled risk ratios comparing obese and non-obese groups were calculated. Prevalence of maternal obesity across Africa ranged from 6.5 to 50.7%, with older and multiparous mothers more likely to be obese. Obese mothers had increased risks of adverse labour, child and maternal outcomes. However, non-obese mothers were more likely to have low-birthweight babies. The differences in measurement and timing of assessment of maternal obesity were found across studies. No studies were identified either on the knowledge or attitudes of pregnant women towards maternal obesity; or on interventions for obese pregnant women. These results show that Africa's levels of maternal obesity are already having significant adverse effects. Culturally adaptable/sensitive interventions should be developed while monitoring to avoid undesired side effects.

2 May 2015 in Journal of Health, Population and Nutrition
Verified
Journal Article
Open access
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OOOjochenemi J Onubi
Ojochenemi J Onubi
APAmudha S Poobalan
Amudha S Poobalan
BDBrendan Dineen
Brendan Dineen
DMDebbi Marais
Debbi Marais
GMGeraldine McNeill
Geraldine McNeill
Child undernutrition has short and long term consequence for both individuals and society. Previous studies show probiotics may promote child growth and have an impact on under-nutrition. A systematic review of the literature was carried out on three electronic databases to assess evidence. The outcome measured was change in weight or height. A narrative analysis was conducted due to heterogeneity of included studies. Twelve studies were included in the review of which ten were randomised controlled trials. A total of 2757 children were included, with 1598 from developing countries. The studies varied in type and quantity of probiotics given, duration of interventions, characteristics of participants, setting and units of outcome measures. Overall, five studies found a positive effect of probiotics on child growth. All five were conducted in developing countries with four studies conducted in mostly under-nourished children and one in well-nourished children. No significant effect on growth was found in the seven studies that were conducted in developed countries. The limited evidence suggests that probiotics have the potential to improve child growth in developing countries and in under-nourished children. More research is needed to explore this further.

1 December 2013 in Food and Nutrition Bulletin
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Journal Article
Closed access
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RTRachel Turner
Rachel Turner
CHCorinna Hawkes
Corinna Hawkes
JWJeff Waage
Jeff Waage
EFElaine Ferguson
Elaine Ferguson
FHFarhana Haseen
Farhana Haseen
BSBhavani Shankar
Bhavani Shankar
Background Concern about food security and its effect on persistent undernutrition has increased interest in how agriculture could be used to improve nutritional outcomes in developing countries. Yet the evidence base for the impact of agricultural interventions targeted at improved nutrition is currently poor. Objective To map the extent and nature of current and planned research on agriculture for improved nutrition in order to identify gaps where more research might be useful. Methods The research, which was conducted from April to August 2012, involved developing a conceptual framework linking agriculture and nutrition, identifying relevant research projects and programs, devising and populating a “template” with details of the research projects in relation to the conceptual framework, classifying the projects, and conducting a gap analysis. Results The study identified a large number of research projects covering a broad range of themes and topics. There was a strong geographic focus on sub-Saharan Africa, and many studies were explicitly concerned with nutritional impacts on women and children. Although the study revealed a diverse and growing body of research, it also identified research gaps. Few projects consider the entire evidence chain linking agricultural input or practice to nutritional outcomes. There is comparatively little current research on indirect effects of agriculture on nutrition, or the effect of policies or governance, rather than technical interventions. Most research is focused on undernutrition and small farmer households, and few studies target consumers generally, urban populations, or nutrition-related non-communicable diseases. There is very little work on the cost-effectiveness of agricultural interventions. Conclusions On the basis of these findings, we make suggestions for research investment and for broader engagement of researchers and disciplines in developing approaches to design and evaluate agricultural programs for improved nutrition.

1 March 2017
Verified
Journal Article
Closed access
YSYagya Prasad Subedi
Yagya Prasad Subedi
DMDebbi Marais
Debbi Marais
DNDavid Newlands
David Newlands

20 May 2015 in JMIR mHealth and uHealth
Verified
Journal Article
Open access
AAAroub Alnasser
Aroub Alnasser
AAAbdulrahman Saleh Alkhalifa
Abdulrahman Saleh Alkhalifa
ASArjuna Sathiaseelan
Arjuna Sathiaseelan
DMDebbi Marais
Debbi Marais
Mobile and tablet apps, ubiquitous and pervasive computing, wearable computing and domotics for health.

1 October 2019 in PLOS Medicine
Verified
Journal Article
Open access
PDF file
RCRishi Caleyachetty
Rishi Caleyachetty
OUOlalekan Uthman
Olalekan Uthman
HBHana Nekatebeb Bekele
Hana Nekatebeb Bekele
RMRocio Martín-Cañavate
Rocio Martín-Cañavate
DMDebbi Marais
Debbi Marais
PKPeggy Koniz-Booher
Peggy Koniz-Booher
Intimate partner violence (IPV) against women is a major global health issue, particularly in low- and middle-income countries (LMICs), that is associated with poor physical and mental health, but its association with breastfeeding practices is understudied. Both the World Health Organization (WHO) and the United Nations Children’s Fund (UNICEF) recommend that children initiate breastfeeding within the first hour of birth and be exclusively breastfed for the first 6 months of life. Breastfeeding within the first hour of birth is critical to newborn survival, and exclusive breastfeeding for 6 months is recognised to offer significant health benefits to mothers and their infants. We examined the association of maternal exposure to IPV with early initiation of breastfeeding (within 1 hour of birth) and exclusive breastfeeding in the first 6 months. We assessed population-based cross-sectional Demographic and Health Surveys (DHS) from 51 LMICs. Data from the most recent DHS in each country (conducted between January 2000 and January 2019) with data available on IPV and breastfeeding practices were used. By WHO region, 52.9% (27/51) were from Africa, 11.8% (6/51) from the Americas, 7.8% (4/51) from the Eastern Mediterranean, 11.8% (6/51) from Europe, 11.8% (6/51) from South-East Asia, and 3.9% (2/51) from the Western Pacific. We estimated multilevel logistic regression models for any IPV and each type of IPV separately (physical violence, sexual violence, and emotional violence), accounting for demographic and socioeconomic factors. Depending on specification, the sample size varied between 95,320 and 102,318 mother–infant dyads. The mean age of mothers was 27.5 years, and the prevalence of any lifetime exposure to IPV among mothers was 33.3% (27.6% for physical violence, 8.4% for sexual violence, and 16.4% for emotional violence). Mothers exposed to any IPV were less likely to initiate breastfeeding early (adjusted odds ratio [AOR]: 0.88 [95% CI 0.85–0.97], p < 0.001) and breastfeed exclusively in the first 6 months (AOR: 0.87 [95% CI 0.82–0.92], p < 0.001). The associations were similar for each type of IPV and were overall consistent across infant’s sex and WHO regions. After simultaneously adjusting for all 3 types of IPV, all 3 types of IPV were independently associated with decreased likelihood of early breastfeeding initiation, but only exposure to physical violence was independently associated with a decreased likelihood of exclusively breastfeeding in the first 6 months. The main limitations of this study included the use of cross-sectional datasets, the possibility of residual confounding of the observed associations by household wealth, and the possibility of underreporting of IPV experiences attenuating the magnitude of observed associations. Our study indicates that mothers exposed to any form of IPV (physical, sexual, or emotional violence) were less likely to initiate breastfeeding early and breastfeed exclusively in the first 6 months. These findings may inform the argument for antenatal screening for IPV in LMICs and the provision of services to not only improve mothers’ safety and well-being, but also support them in adopting recommended breastfeeding practices.