- Research article
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The double burden household in sub-Saharan Africa: maternal overweight and obesity and childhood undernutrition from the year 2000: results from World Health Organization Data (WHO) and Demographic Health Surveys (DHS)
BMC Public Health volume 14, Article number: 1124 (2014)
Previous studies have characterized an increasing trend of double burden households, or households with individuals experiencing both undernutrition and obesity, in countries undergoing a nutrition transition. Although most prior studies indicate the prevalence of double burden households is highest in middle-income countries, there is some support for an increase in double burden households in sub-Saharan African countries as well.
Using data from the Demographic Health Surveys (DHS) and the World Health Organization (WHO), the prevalence of double burden households in sub-Saharan African countries was calculated and the associations between prevalence of overweight/obese adults and underweight, stunted and wasted children were evaluated at the country and household (DHS only) levels. Restricted analyses and frequencies were calculated using urban-only datasets. Surveys from 28 African countries were available using WHO data and 26 from the DHS surveys. Only surveys that were conducted after 2000 were included in analyses.
Using the WHO datasets, there were inverse associations between the prevalence of overweight and obesity in adults and underweight, stunting and wasting in children. Correspondingly, there were positive associations between adult underweight and child underweight, stunting and wasting. These associations were not significant in a smaller sample size using urban-only surveys. The prevalence of double burden households in DHS datasets was low: under 5 percent for obese mothers and underweight, stunted or wasted child pairs with a slightly higher percentage for overweight mothers and children with undernutrition. Restricting the analysis to urban only populations did not increase the frequencies of double burden households significantly.
There was a low prevalence of double burden households in recent data from sub-Saharan Africa. Countries that have a high prevalence of child undernutrition correspondingly have a high prevalence of adult underweight and low prevalence of adult overweight and obesity.
Overweight and obesity and malnutrition globally
The number of overweight and obese women has continued to increase internationally including in low-income countries such as those in sub-Saharan Africa . Meanwhile, undernutrition is associated with one third to one half of the deaths of children under 5 years of age globally . In sub-Saharan Africa, 28% of children under 5 years of age are moderately or severely underweight  with 38% of children under five stunted . These numbers have not significantly changed since 1990 when 32% of children under 5 were moderately or severely stunted . Meanwhile global obesity prevalence has doubled since 1980 . In a study of 7 African countries (Burkina Faso, Ghana, Kenya, Malawi, Niger, Senegal and Tanzania), the prevalence of urban adult overweight and obesity increased approximately 35% from 1992 to 2005 . Similarly, the prevalence of overweight and obesity among preschool children is expected to increase from 8.5% in 2010 to 12.7% in 2020 .
Double -burden households
Recent studies have found an increasing trend of ‘dual burden’ or double burden households, households that have both underweight or stunted and overweight/obese persons [7, 8]. In particular, countries that are in the middle range of gross national product (GNP) have been found to have the highest prevalence of dual burden homes, most commonly with stunting and/or underweight among children coexisting with an overweight or obese mother [7, 8]. In studies conducted in Brazil, China, Indonesia, United States and Vietnam, dual burden households were more likely to be urban and among the highest income levels in contrast with underweight-only households. However, double burden homes were not easily distinguished from overweight-only households . The nutrition transition, a change in activity levels and dietary patterns that happens when a country passes to higher levels of economic development facilitating the availability of cheaper energy dense and nutrient poor food stuffs, could be responsible for the co-existence of obesity and undernutrition in the same homes [8–10]. Meanwhile, however, some studies from sub-Saharan Africa have found a low prevalence of double burden households [8–10].
In a report of data from the Demographic and Health surveys of 23 sub-Saharan African countries, African countries surveyed had less than 10% of households with stunted child-overweight mother pairs with the exception of Egypt, which had 14% . A study from urban Benin (Cotonou), found a higher prevalence (16.2%) of households with concurrent maternal overweight/obesity and child stunting or child wasting . Meanwhile, the majority of the Demographic and Health surveys in the study by Garrett and Ruel  were from the period of 1991-1998. It is possible that in the last 10-20 years, the prevalence of double burden households has increased significantly in sub-Saharan African countries, particularly in urban areas that have had more of a nutrition transition. The prevalence of stunted child-overweight mothers was higher in urban African areas in comparison with rural ones because of the fewer number of women who are overweight/obese in rural areas .
In a more recent study using Demographic Health Survey data from the early 2000s from North Africa, sub-Saharan Africa, Asia and Latin America, Jehn and Brewis  found that low levels of maternal education, working in agriculture, living in urban areas, increased siblings in the household and relative poverty were associated with increased risk of dual burden households. However, Jehn and Brewis  found that the overall prevalence of dual burden households was low in the African countries surveyed, particularly the prevalence of maternal overweight and child underweight homes (<5% of households). Jehn and Brewis  examined only a limited number of surveys from sub-Saharan African countries and used data collected in the early 2000’s. Since the time of publication, DHS has released a new series of surveys (DHS V); many conducted post 2005 that are included in the analysis below.
In this review of double burden households in sub-Saharan Africa, we assess both the association between maternal body mass index (BMI) category and child undernutrition using country level data (World Health Organization Survey Data from the Nutrition Databases) and the prevalence of double burden households using household level data as described below (DHS data). In contrast with previous studies, we evaluate associations using post-2000 data, with a particular emphasis on data collected after 2005.
Two different survey sets were used to evaluate the prevalence of double burden households and estimate the possible association between maternal overweight/obesity and child undernutrition. These datasets were publically available and no unique identifiers were available. The WHO surveys were included in this analysis given the large number of surveys conducted in each country. However, as the data were not collected at the household level, it was not possible to assess the prevalence of double burden households but only evaluate the country-level associations between adult BMI category and child undernutrition. For WHO data, in some case women and in other cases combined women and men data are available. The Demographic Health Surveys were also included in this study so as to be able to assess the prevalence of double burden households in sub-Saharan African countries using household level data, albeit using a smaller number of surveys per country than those available in the WHO database. The specific datasets and methods used are described in detail below.
To estimate the possible relationship between maternal overweight/obesity and child stunting and underweight, we used the World Health Organization’s (WHO) Global Database on Child Growth and Malnutrition and the WHO’s Global Database on Body Mass Index to assess a possible correlation between frequencies of adult obesity (a body mass index (BMI) ≥30 m/kg2), overweight (BMI ≥25 m/kg2), underweight (BMI <18.5 m/kg2) and child stunting (having a height-for-age Z score < -2 standard deviations (SD) below the international reference median or < -3SD for severe stunting, underweight (having a weight-for-age Z score < -2 SD or < -3SD for severe underweight, wasting (having a weight-for-height Z score or a BMI-for-age z-score < -2SD or < -3SD for severe wasting), overweight (having a BMI-for-age z-score > +2 SD) and obesity (BMI-for-age z score > +3 SD). Data from the following 28 sub-Saharan Africa countries were included from the WHO databases: Benin, Burkina Faso, Cameroon, Chad, Congo, Democratic Republic of the Congo, Eritrea, Ethiopia, Gabon, Ghana, Kenya, Lesotho, Liberia, Madagascar, Malawi, Mali, Mauritania, Morocco, Mozambique, Namibia, Niger, Nigeria, Rwanda, Sierra Leone, Swaziland, Uganda, Zambia, Zimbabwe. WHO compiles data collected from national and sub-national surveys [11, 12]. We restricted all analyses to surveys conducted after the year 2000 in the two databases [11, 12]. Children in the WHO datasets are under 5 years of age.
The WHO Global Database on Body Mass Index combined BMI results from men and women and included the use of 3,169 surveys and smaller studies from 28 countries (2,642 national and 527 subnational surveys). The criteria WHO uses for surveys included in its database is a defined population-based sampling frame and a probabilistic sampling procedure involving at least 400 children . Using the results of BMI from women only, the restricted sample included 1,432 surveys and excluded those samples that had combined results for adults of both sexes. The WHO’s Global Database on Child Growth and Malnutrition had a smaller number of surveys on child anthropometrics (n = 1,948) but we still used the same number of African countries listed above (n = 28).
Furthermore, we conducted a smaller subset analysis of urban surveys only with data from 23 countries, which included 89 surveys of which 58 were women only. Means and standard deviations were calculated for each country for percentage of BMI in the overweight and/or obese category and child anthropometrics using Stata 13.0. Linear regression was subsequently used to evaluate relationships between mean frequencies of adult overweight/obesity and mean levels of stunting, wasting and underweight by country.
Sampling weights for the different surveys were not provided by WHO. Subsequently, analyses were restricted to adult female BMI numbers only and then to surveys conducted only among urban residents. In the analyses that included all adults and women only, the sample size was n = 28 African countries for both adults and only women while in the urban only analyses the sample size was n = 23 African countries.
The WHO surveys include surveys from UNICEF, UN Statistics Division, FAO, the World Bank, International Food Policy Research Institute (IFPRI) and the Demographic and Health Surveys (DHS) among others . We used the WHO nutrition databases in this analysis because of the compiled, large number of different surveys included in addition to analyzing the DHS surveys, which present the opportunity for analyses of individual households.
Demographic Health Surveys (DHS)
Analysis was conducted also using the Demographic Health Surveys (DHS) for the following 26 sub-Saharan African countries specific years: Benin (2001), Burkina Faso (2003), Cameroon (2004), Congo (Brazzaville) 2005, Gabon (2000), Ghana (2003, 2008), Guinea (2003), Kenya (2003, 2008), Lesotho (2004, 2009), Liberia (2007), Madagascar (2003), Malawi (2000), Mali (2001, 2006), Mozambique (2003), Namibia (2007), Niger (2008), Nigeria (2003, 2008), Rwanda (2000), Sao Tome (2009), Senegal (2005), Sierra Leone (2006), Swaziland (2006), Tanzania (2005, 2010), Uganda (2006), Zambia (2002, 2007), Zimbabwe (2005). Countries were not included if they did not have a survey conducted in 2000 or later or if they did not include a measurement of maternal BMI and child anthropometrics as part of the information collected.
The children’s file which included mother’s BMI measurement and child anthropometrics was used for all analyses. Sampling weights were used in calculations as provided by the DHS . In the DHS surveys, it was possible to evaluate individual households and the prevalence of double burden households. Similar to the WHO datasets, the age of the children in the DHS surveys is under 5 years. Using the DHS data, we evaluated the prevalence of double burden households by country surveyed as well as assessed whether this was higher in urban areas in comparison with rural areas or among mothers with a secondary education in comparison to those with no education or only a primary education. Maternal obesity was defined as having a BMI ≥ 30 m/kg2, overweight (BMI ≥ 25 m/kg2), underweight (BMI <18.5 m/kg2) and child stunting (having a height-for-age Z score < -2 standard deviations (SD) below the international reference median), underweight (having a weight-for-age Z score < -2 SD) and wasting (having a weight-for-height Z score < -2SD). Analyses of double burden household prevalences used the definitions of undernutrition (and did not restrict to severe undernutrition alone < -3SD) given the low prevalence of double burden households using the more expansive definition. All analyses were conducted using Stata 13.0 and with svy commands.
The mean prevalence of adult obesity in the WHO dataset was 7.5 ± 6.0% while adult overweight was much higher at 21.8 ± 10.2% and adult underweight was 13.4 ± 7.0%. Stunting (<-2SD) was 38.7 ± 7.8% and severe stunting (<-3SD) was 19.0 ± 5.7%. Underweight (<-2SD) was 21.5 ± 8.8% and severe underweight (<-3SD) was 7.96 ± 4.3%. Wasting (<-2SD) was 10.0 ± 4.4% and severe wasting (<-3SD) was 4.0 ± 2.2%. In the urban surveys, the prevalence of adult obesity and overweight were higher (12.5 ± 7.0% and 31.8 ± 12.8%), child undernutrition was generally lower(30.4 ± 8.4% for stunting < -2SD and 13.3 ± 5.2% for severe stunting < -3SD, 15.5 ± 7.0% for underweight < -2SD and 5.2 ± 2.8% for underweight < -3SD and 12.0 ± 5.0% for wasting < -2SD and 3.4 ± 1.8% for wasting < -3SD) and adult underweight (10.5%) was also lower.
In both the overall combined analysis using data from men and women and the analysis of just women, we found that there were significant relationships between the prevalence of adult BMI category and % of children underweight, wasted, stunted, overweight or obese (Tables 1, 2, 3 and 4).
Specifically, looking at the associations in adult men and women, wasting (<-3SD) was positively associated with adult underweight, while wasting (<-2SD) was positively associated with adult underweight and negatively associated with adult overweight and obesity (Table 1). For stunting, adult overweight and obesity were inversely associated with stunting while the association between adult underweight and severe stunting had a p value equal to 0.07(Table 1). Child underweight (both < -2SD and < -3SD weight for age Z scores) was negatively associated with adult obesity and overweight and positively correlated with adult underweight. Child BMI Z score < -2SD or < -3SD (child wasting) was positively associated with adult underweight and child overweight and obesity were positively associated with adult overweight and obesity and negatively associated with adult underweight (Table 1).
In the restricted analyses, adult women only, the results were comparable to those that included men and women (Table 2). Using a smaller dataset from only urban surveys (n = 23 African countries), we found fewer associations. Child stunting was associated with adult underweight, as was child underweight. Child overweight was inversely associated with adult underweight (Table 3). Using the urban sample with only women, the sole association that was significant was the inverse association between child overweight/obesity and adult underweight (Table 4).
The associations between adult obesity and underweight, and child severe stunting and severe underweight, are also shown graphically in Figures 1, 2 and 3. In Figure 1, the reduced prevalence of childhood stunting is shown in countries that have an increased prevalence of adult obesity while adult underweight is associated with a higher prevalence of child underweight by country (Figure 2). Increased childhood stunting by country is also modestly associated with increased prevalence of adult underweight (Figure 3).
The overall prevalence of maternal overweight and obesity in the 27 DHS countries surveyed was 16.5% (95% CI 16.1-17.0%), maternal obesity was 5.1% (95% CI 4.8-5.3%) and maternal underweight was 10.4% (95% CI 10.1-10.7%). The prevalence of maternal overweight and obesity was higher than 20% in the following countries and years: Congo 2005, Ghana 2008, Namibia 2007, Nigeria 2003, Nigeria 2008, Sao Tome 2009, Sierra Leone 2006, Swaziland 2006 and Zimbabwe 2005 (Figure 4). The overall prevalence was higher in urban areas for maternal overweight and obesity (30.3% (95% CI 29.5-31.2%) and obesity10.5% (95% CI 10.0-11.0%)) but lower for maternal underweight (7.6%, 95% CI 7.1-8.0%) in comparison with the national prevalence. The overall prevalence of child stunting (<-2SD) was 37.8%, (95% CI 37.4-38.3%) and severe stunting (<-3SD) was 17.4% (95% CI 17.1-17.8%), wasting (<-2SD) was 8.4% (<-3SD was 1.8% (95% CI 1.75-1.94%) and underweight (<-2SD) was 25.5%, (95% CI, 25.1-26.0%) and severe underweight (<-3SD) 7.3% (95% CI 7.1-7.5%). The child undernutrition prevalence was lower in the urban areas (27.2% (95% CI 26.5-28.0%) for stunting, 7.1% (95% CI 6.7-7.5%) for wasting and 17.4% (95% CI 16.8-18.1%) for underweight) in comparison with national prevalence. There was no observable association at the country level between maternal overweight and obesity and child undernutrition although the percentage of maternal overweight and obesity appeared to decrease with higher levels of child undernutriiton (Figures 5, 6 and 7).
The prevalence of households that included an obese mother with a child with undernutrition (defined as stunted, underweight or wasted) was less than 5% for all the countries surveyed with the exception of Swaziland in 2006, which had a prevalence of 9.50% for the pairing of an obese mother with an underweight child (Table 5). The total prevalence of double burden houses combining all the households from the countries surveyed was 0.50% (95% CI 0.46-0.55%) for obese mother/underweight child pairs, 0.98% (95% CI 0.91-1.06%) for obese mother/stunted child and 0.24% (95% CI 0.21-0.27%) for obese mother/wasted child (Table 5).
When the double burden household analysis was restricted to urban households only, the prevalence of double burden households was not significantly increased. For obese mothers/underweight child pairs the prevalence was 0.92% (95% CI 0.81-1.04%), 1.79% (95% CI 1.62-1.98%) for obese mothers/stunted child pairs and 0.50% (95% CI 0.42-0.59%) for obese mothers/wasted child pairs (Table 5). Restricting the analysis to those who had completed some secondary education, the prevalence was similar at 0.93% for obese mother/underweight child pairs, 1.46% for obese mother/stunted child pairs and 0.59% for obese mother/wasted child pairs (Table 5). The prevalence of maternal overweight and child undernutrition was higher than that found for obese mothers: 4.34% (95% CI 4.19-4.50%) for maternal overweight and child stunting, 2.11% (95% CI 2.02-2.22%) for maternal overweight and child underweight and maternal overweight and child wasting was 0.89% (95% CI 0.83-0.96%). These prevalence were also higher when restricted to urban areas alone (6.11% for overweight/stunted pairs, 3.19% (95% CI 2.96-3.43%) for overweight/underweight pairs and 1.68% (95% CI 1.53-1.86%) for overweight/wasted pairs).
The overall prevalence of underweight mothers with children with undernutrition was higher in the sub-Saharan African countries surveyed. The prevalence for underweight mother/underweight child pairs was 4.85% (95% CI 4.67-5.04%), 4.74% (95% CI 4.56-4.92%) for underweight mother with stunted child, and 1.50% (95% CI 1.41-1.59%) for underweight mother with wasted child (Table 6). Meanwhile, the overall prevalence of maternal underweight was 10.4%. However, the prevalence of an underweight mother with a child with undernutrition was greater than 5% for 8 countries and approached 10% in some cases (Table 6). The prevalence of underweight moms with child undernutrition was noticeably lower when restricted to urban areas or those mothers with some secondary education (Table 6).
While prevalence for childhood stunting and underweight are high in all of the countries surveyed (between 30-40% for stunting and 20-30% for underweight for many of the countries), a clear trend in the association between childhood undernutrition and maternal obesity or overweight does not emerge.
Low prevalence of double burden households
The overall prevalence of double burden households in the sub-Saharan African countries surveyed was not significantly higher than that found by the other studies, [8, 9] which evaluated the double burden prevalence using DHS and other surveys in the time period up until the early 2000s. A higher prevalence was observed for double burden households defined as maternal overweight with child undernutrition in comparison with maternal obesity and child undernutrition, however, the prevalence of these types of double burden households was still less than 10% and was not higher than 10% in any individual country or year. The prevalence of households with maternal underweight paired with child undernutrition was also less than 10% for any individual country or year, although the prevalence was higher than for the double burden households with maternal overweight or obesity.
When the analyses were restricted to urban areas or women with a higher educational background, the prevalence of double burden households did not change remarkably, although slightly higher for maternal obesity and child undernutrition households. This was not surprising as the overall percentage of undernutrition in children is lower in urban areas compared with national prevalences even though the prevalence of obese and overweight women is higher. Other studies using African DHS data to evaluate trends over time have found that the prevalence of urban adult overweight and obesity increased by 35% from 1992 to 2005 approaching 30% in urban areas . Meanwhile, the prevalence of child undernutrition, specifically stunting, has not changed significantly in the last 10-20 years in African countries  and underweight has increased  although it is not clear if child undernutrition prevalence is lower in urban areas.
These findings are in contrast with some previous studies, which have found a higher prevalence of double burden households in sub-Saharan African countries and have predicted an increase in prevalence in coming years such as the study by Bouzitou et al. in 2005,  which found a prevalence of 16.2% of double burden households (combining households with childhood stunting (<-2 height-for-age Z score) and wasting (<-2 weight-for-height Z score) and overweight mothers in urban Cotonou (Benin). However, in the study by Jehn and Brewis published in 2009 , only Ghana had a prevalence of overweight mother-stunted child pairs >10% out of 9 African countries surveyed. Similarly, the review by Garrett and Ruel  of 23 North African and sub-Saharan African countries using earlier DHS surveys found less than 10% of households had an overweight mother and stunted child (with the exception of Egypt). Our study, however, was more comprehensive than the study by Garrett and Ruel  and the one by Jehn and Brewis , which did not include the most recent DHS surveys.
Increases in maternal overweight/obesity
Jehn and Brewis  conclude that any possible increases in the existence of double burden households should be attributed to the overall increase in the prevalence of overweight and obesity in women in developing countries, rather than any observable increase in child undernutrition in relation to adult overweight/obesity. As we did not investigate changes in prevalence of child undernutritition or adult obesity in any of the sub-Saharan African countries surveyed, it is outside of the scope of this paper to speculate on trends in prevalence of adult obesity or child undernutrition. However, we did not find any increase in the prevalence of double burden household relative to the earlier study done by Jehn and Brewis  also using DHS data.
We also found a high prevalence of overweight and obesity in women in all the sub-Saharan African countries surveyed, particularly in urban areas, in excess of 30% in many sub-Saharan African countries and exceeding 40% in a few (Figure 4). Moreover, this trend is particularly evident among women who have completed more education (secondary education), with all but 6 of the 26 countries included in the analysis, having greater than 40% overweight and obesity for educated women. As the prevalence of underweight, stunting and wasting were all lower in urban areas, those areas that correspondingly had the highest levels of overweight and obesity, it is possible the low percentage of double burden households reflects the low prevalence of undernutrition, irrespective of the concomitant increases in overweight/obesity. Alternatively, Garrett and Ruel  also found a low prevalence of double burden households (stunted children and overweight mothers) in African urban areas but had a different explanation. They concluded that higher levels of economic development and urbanization (than currently present in African urban areas) would increase adult obesity but not necessarily ameliorate the prevalence of child underweight, which would still be at significant levels, resulting in an increase in double burden households. Many sub-Saharan African countries may not meet this threshold for economic development.
In the regression analyses using WHO datasets which included more surveys than the DHS analysis, there was a negative association between overweight/obesity in women and child undernutrition and a positive association between underweight in women and child undernutrition as expected. We did not see any negative relationship between overweight/obesity in women and child undernutrition when restricting the analysis to urban areas only. It is possible that because of the relatively high overall prevalence of adult overweight/obesity irrespective of household category, particularly in the urban only surveys, greater power is needed to assess any statistical association between overweight/obese mothers and children with undernutrition.
In the WHO and DHS analyses, there was no adjustment or stratification based on household income levels. Previous studies have found that the highest income households, particularly in urban areas were the most likely to be double burden households with the study by Doak et al.  reporting these findings from Vietnam, China, Indonesia, Brazil and the United States (2005). Doak et al. , also note that the lowest prevalence of double burden households are in those countries that have the lowest prevalence of overweight and obesity, such a Vietnam, and are at an earlier stages of the nutrition transition. However, in contrast with the study conducted by Doak et al. , the prevalence of overweight and obesity was high in the urban African women from the countries we surveyed while the prevalence of double burden households was low. We would have anticipated seeing a higher percentage of double burden households, and yet the overall prevalence of double burden households is much less than that reported for countries with lower levels of adult obesity such as Indonesia, Brazil and Krgyzstan (above 10% for each).
As argued by Garrett and Ruel , it is possible that the level of economic development, irrespective of urbanization status, is not high enough in the African countries surveyed to account for a greater percentage of double burden households. During the nutrition transition, individual diets become more important rather than factors affecting the entire household such as food security or income. Additionally, the increasing availability of cheaper, energy-dense, low quality, nutrient poor foods could account for the concomitant existence of child undernutrition and adult overweight. It is possible that the availability of these food items is more limited in urban African areas in contrast with Latin American or Asian counterparts. Specifically, the consumption of soda/soft drinks is much higher in Latin America than African countries .
Future studies need to assess the dietary intake of double burden households in contrast with normal weight or underweight households. In the study by Bouzitou et al.  from Benin, those households that were at the greatest risk for being double burden were household that had the lowest food diversity scores, however, it is not clear how food diversity in the urban African context relates to income or consumption of energy dense, low nutrient value foods.
Further studies need to be conducted on the relation between household income and risk for double burden households in sub-Saharan African countries as well as to better characterize the nutrition transition in African countries. These studies should focus on explaining the seeming paradox of a low prevalence of double burden households in urban areas with increasing adult obesity rates. Furthermore, the increasing obesity prevalence and the failure to decrease child under-nutrition in African countries suggested by Ziraba et al.  and de Onis et al.  points to the possibility that double burden homes will be a growing problem. Interventions that target households as a whole to increase food availability and access, should be combined with approaches that encourage access to better quality food stuffs, to prevent the concurrent development of obesity.
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Funding was supported in part by NIH NIDDK 080825.
The author declares that she has no competing interests.
JMW came up with the study idea, wrote the manuscript and conducted all analyses.
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Wojcicki, J.M. The double burden household in sub-Saharan Africa: maternal overweight and obesity and childhood undernutrition from the year 2000: results from World Health Organization Data (WHO) and Demographic Health Surveys (DHS). BMC Public Health 14, 1124 (2014). https://doi.org/10.1186/1471-2458-14-1124
- Standard Deviation
- Maternal Obesity
- Demographic Health Survey
- Child Pair
- Obese Mother