Socio-biomedical predictors of child nutrition in India: an ecological analysis from a nationally representative Demographic and Health Survey, 2015–2016
Journal of Health, Population and Nutrition volume 41, Article number: 1 (2022)
Despite significant economic growth and development, undernutrition among children remains a major public health challenge for low- and middle-income countries in the twenty-first century. In Millennium Development Goals, India committed halving the prevalence of underweight children by 2015. This study aimed to explain the geographical variation in child malnutrition level and understand the socio-biomedical predictors of child nutrition in India.
We used the data from India’s National Family Health Survey 2015–2016. The survey provided estimates of stunting, wasting, and underweight at the national, state, and district level to measure nutritional status of under-five children. Level of stunting, wasting and underweight at the district level are considered as outcome variables. We have used variance inflation factor to check the multicollinearity between potential predictors of nutrition. In this study, we performed spatial analysis using ArcGIS and multiple linear regression analysis using Stata version 15.
Five states (Uttar Pradesh, Bihar, Madhya Pradesh, Jharkhand and Meghalaya) had very high prevalence of stunting (40% and above). High prevalence of wasting was documented in Jharkhand, Madhya Pradesh, Chhattisgarh, and Karnataka (23 to 29%). Jharkhand, Madhya Pradesh, Maharashtra, and Chhattisgarh had the highest proportion of underweight children in the country. We found that electricity and clean fuel use in the household, use of iodized salt, and level of exclusive breastfeeding had significantly negative influence on the stunting level in the districts. The use of iodized salt has similar effect on the wasting status of under-five children in the districts (b: − 0.27, p < 0.10). Further, underweight level had a negative association with clean fuel use for cooking (b: − 0.17, p < 0.01), use of iodized salt (b: − 0.36, p < 0.10), breastfeeding within one hour (b: − 0.18, p < 0.10), semisolid/solid food within 6–8 months (b: − 0.11, p < 0.05) and Gross Domestic Product of the districts (b: − 0.53, p < 0.10).
In the study, a variety of factors including electricity and clean fuel use in the household, use of iodized salt, level of exclusive breastfeeding, breastfeeding within one hour, semisolid/solid food within 6–8 months and Gross Domestic Product of the districts have a significant association with nutritional status of children.
Since Paleolithic man emerged on Earth, the mankind has faced major shifts in dietary and physical activity patterns and body composition. Human dietary patterns and nutritional status have undergone a sequence of major shifts among characteristic states—defined as broad patterns of food use and corresponding nutrition-related diseases. Although this shift leaned toward increased obesity and noncommunicable diseases (NCDs) in recent time , undernutrition among children remains one of the main public health challenges of the twenty-first century, particularly in low- and middle-income countries like India . The prevalence of underweight children in India is among the highest in the world, and nearly doubles that of Sub-Saharan Africa with dire consequences for morbidity, mortality, productivity and economic growth . This is evident from National Family Health Survey 2015–2016 of India that almost 38 percent of the preschool children are stunted, 36 percent underweight and 21 percent wasted . In this line that National Health Policy 2017 also recognized the importance of malnutrition and stated that “undernutrition restricts survival, growth and development of children. It contributes to morbidity and mortality in vulnerable populations, resulting in substantial diminution in productive capacity in adulthood and consequent reduction in the economic growth and well-being of the countries” . India was committed toward halving the prevalence of underweight children by 2015 as a key indicator for achieving the Millennium Development Goal (MDG) of eradicating extreme poverty and hunger . Despite the best efforts to improve child malnutrition through various national health programs including supplementary nutrition in Integrated Child Development Services (ICDS) through mid-day meal in schools , micronutrient initiatives, etc., the level of undernutrition remains staggering. Again, there has been wide socioeconomic disparities in health and nutritional outcomes across the geographies, religion, caste, and other socioeconomic characteristics which is debated among researchers and policy makers [10, 13, 18, 29]. The roots of this heavy toll lie in India’s inability to improve child nutrition arises from the policy environment that lacks an evidence base on socioeconomic and biomedical factors responsible for undernutrition and effectiveness of the interventions to deal with . Based on this background, the present study was conducted to explain the geographical variation child malnutrition level and understand the socio-demographic and biomedical predictors of child nutrition in India.
Methods and materials
The four waves of National Family Health Survey (NFHS) were conducted under the supervision of the International Institute for Population Sciences (IIPS), Mumbai, India, which serves as a regional institute for training and research in population studies for the Economic and Social Commission for Asia and the Pacific (ESCAP) region. Formal written consents were obtained from the respondents and ethical issues were resolved before the respondents were interviewed. This study is based on anonymous public use reports with no identifiable information about the survey participants.
This study used the data from India’s nationally representative survey, National Family Health Survey 2015–2016 (NFHS-4). NFHS 2015–2016 was the first of the NFHS series (NFHS 1992–1993, NFHS 1998–1999, and NFHS 2005–2006) that collected data in each of India’s 29 states and all 7 union territories. NFHS-4 also provided estimates of most indicators at the district level for all 640 districts of the country included in the 2011 Census. In NFHS-4, women aged 15–49 years and men aged 15–54 years were interviewed. This survey was conducted during January 2015 to December 2016 by 14 field agencies and gathered information from 601,509 households, 699,686 women and 103,525 men.
The data used for this study are the compilation of fourth round of National Family Health Survey (NFHS, 2015–2016) factsheets. The NFHS is Indian version of Demographic and Health Survey (DHS) which is a standardized survey over 90 countries with over 300 surveys worldwide. The NFHS-IV is coordinated by the International Institute for Population Sciences (IIPS) with financial support of the Ministry of Health and Family Welfare, Government of India. It provides information on important indicators of maternal and child health, fertility and mortality. NFHS-4 fieldwork for India was conducted from January 2015 to December 2016 by 14 field agencies and gathered information from 601,509 households, 699,686 women, and 103,525 men using multistage probability proportionate sampling. In this paper, we used the information collected on anthropometric measures used to measure nutritional status of under-five children of the women in 15–49 years. NFHS-4 covered all the 29 states and 7 union territories and for the first time provides information on district level (all 640 districts in India as per census 2011) estimates for many important indicators. The details of sampling procedure and data collection protocol can be found elsewhere .
The information from all district- and state-level factsheets was brought together in excel sheet. The relevant indicators of nutrition and other socioeconomic variables were used for the analysis. Data were filtered and cleaned before used for analysis. In addition, socioeconomic variables available in NFHS, we also used district-wise Gross Domestic Product (GDP) from data by Ministry of Statistics and Programme Implementation (MOSPI). The detailed outcome and independent variables used in the study are discussed below.
The three standard indices of physical growth identified by World Health Organization (WHO) are used as outcome variables to describe nutritional status of children. Weight for age (underweight) is an indicator of either current or past nutrition, whereas height for age (stunting) is an indicator of past nutrition. Weight for height (wasting) is a sensitive indicator of current nutrition status and the degree of wasting. These three indices are made dichotomous with Z-score below minus two standard deviation which is considered as stunted, wasted and underweight and the rest as not stunted, wasted and underweight. These indices are used to measure nutritional status of children which is used as dependent variable. These three nutritional status indicators are expressed in standard deviation unit (Z-score) from the median of the reference population.
Various socioeconomic, demographic, child and maternal factors are taken into account as independent variable. Description of the independent variables is given in “Appendix 1”.
Data cleaning and preparation
NFHS-IV, Census and GDP data have been extracted into excel files. Each state- and district-level excel files have been cleaned properly considering the missing values. After that, we have converted excel files into Stata file so that other bivariate and multivariate analyses can be performed. Each district- and state-level excel files have been cleaned properly considering the missing values.
We used Stata (version 15) and ArcGIS (version 10.3) software to analyze data in this study. We applied similar methodology used to calculate the cutoff values for public health significance for underweight, stunting and wasting for children under 5 years of age based on the WHO child growth standards using NFHS data on malnutrition. The classification can be found elsewhere . In addition to spatial analysis, we performed multiple linear regression and multivariate multiple linear regression using STATA. Multicollinearity is a high degree of correlation (linear dependency) among several independent variables. It commonly occurs when a large number of independent variables are incorporated in a regression model. In this study, we have used variance inflation factor to check the multicollinearity between independent variables. Variance inflation factor is the reciprocal of the tolerance. We have tested multicollinearity taking 22 independent variables into predictive model (see “Appendix 2”). Symptoms of multicollinearity have been observed through the VIF value. So variables having VIF > 10 have been excluded from the regression model. In this study, we have used variance inflation factor to check the multicollinearity between independent variables. Variance inflation factor is the reciprocal of the tolerance.
VIF is given by the formula
where (1 − R2) is the tolerance and R2, coefficient of determination.
Multivariate simple linear regression analysis was used to understand different socioeconomic and biomedical factors associated with child undernutrition level. Simple linear regression was used considering the continuous nature of the dependent variable, i.e., level of stunting, wasting and underweight at the districts. Multivariate analytical techniques represent a variety of mathematical models used to measure and quantify outcomes, taking into account important factors that can influence this relationship.
Spatiotemporal distribution of childhood undernutrition
Figure 1 shows the temporal changes in under-five child nutrition level during 2005–16. The graph shows that stunting has been declined by 10 points (48% to 38%) and underweight has gone down by 7 points (42.5% to 35.75) while wasting has gone up by 1 point (20% to 21%). Figures 2, 3 and 4 show geographical distribution of stunting, wasting and underweight under-five children across Indian states, respectively, as defined by WHO cutoff value for public health significance. Five states (Uttar Pradesh—46.3%, Bihar—48.3%, Madhya Pradesh—42.0%, Jharkhand—45.3% and Meghalaya-43.8%) had very high prevalence (≥ 40%) of stunting and 11 more states including developed states like Karnataka and Andhra Pradesh had high prevalence (30–39%) of stunting. The majority of the states are critical stage in terms of stunting according WHO classification on wasting. High proportion of wasting among the under-five years children was documented in Jharkhand (29.0%), Madhya Pradesh (25.8%), Chhattisgarh (23.1%) and Karnataka (26.1%). Among northeastern states, Arunachal Pradesh (17.3%) showed the highest proportion of stunted children. Twelve states have very high prevalence (≥ 30%) of underweight children and among them Jharkhand (47.8%), Madhya Pradesh (42.8%), Maharashtra (36.0%) and Chhattisgarh (37.7%) are the five states with the highest proportion of underweight children in the country. The detail of top 5 and bottom states in child undernutrition is shown in Table 1.
District-level analysis showed that child undernutrition was most prevalent in districts of Uttar Pradesh, Bihar, Odisha, Rajasthan and Gujarat (Figs. 5, 6, 7). The bottom 20 districts had the highest proportion of stunting was found in the state of Uttar Pradesh (10 districts), Bihar (5 districts), Jharkhand and Karnataka (2 districts each) and Rajasthan (1 district), whereas the highest proportion of underweight children was found Jharkhand and Uttar Pradesh (4 districts each), Gujarat, Rajasthan, Bihar, and Madhya Pradesh (2 districts each), West Bengal, Maharashtra and Karnataka (1 district each) (see Table 2).
Comparison of NFHS-I (1991–92) and NFHS-IV (2015–2016) reveals that Tripura, Arunachal Pradesh and Gujarat had the highest proportion of decline in stunted children whereas Rajasthan and Nagaland had the lowest decline in proportion of stunting children (Fig. 8).
Correlation between dependent and independent variables
Stunting had an inverse correlation with better sanitation and improved cooking fuel at the household, women having access to complete antenatal care and postnatal care, and children who were exclusively breastfed for 6 months. The diarrhea incidence had a direct positive correlation with stunting among children. There was a negative correlation between wasting and complete antenatal care, exclusive breastfeeding for six months, and semisolid food initiation within 6–8 months, and children receiving adequate diet. The proportion of underweight children had negative correlation with improved sanitation level, literacy level, complete antenatal care level, postnatal care level and exclusive breastfeeding for six months.
Table 3 presents the results of simple linear multivariate regression analysis. Our results showed the factors which affected the level of stunting, wasting and underweight children. We found that electricity and clean fuel use in the household, use of iodized salt and level of exclusive breastfeeding had significantly negative influence on the stunting level in the districts. The use of iodized salt has similar effect (b: − 0.27, p < 0.10) on the wasting status of under-five children in the districts. Further, underweight level had a negative association with clean fuel use for cooking (b: − 0.17, p < 0.01), use of iodized salt (b: − 0.36, p < 0.10), breastfeeding within one hour (b: − 0.18, p < 0.10), semisolid/solid food within 6–8 months (b: − 0.11, p < 0.05) and Gross Domestic Product (GDP) of the districts (b: − 0.53, p < 0.10). There was a direct association between diarrhea incidence (b: − 0.32, p < 0.05) and underweight status of the children.
Despite of decline in undernutrition level in last decade, the largest chunk of global undernourished under-five children is in India with about two-fifths of children being stunted and underweight, and one-fifth were wasted in 2015–2016. The improvement in average annual decline in proportion of underweight children is evident from previous two decades. This decline has improved from 0.42 percentage point per year during 1991–2005  to 0.68 percentage point (2005–2006 to 2015–2016). However, there exists a wide geographical diversity in childhood undernutrition. To achieve the global nutritional targets of World Health Assembly 2012, and SDGs targets, it is pertinent to understand spatial distribution and their sociodemographic and biomedical predictors.
We found that underweight and stunting level among under-five is highly concentrated in central and western Indian states of Rajasthan, Gujarat, Bihar, Uttar Pradesh, Jharkhand, Chhattisgarh and Madhya Pradesh. This is in coherence with national priorities of Govt of India. The twelfth five-year plan of India (2012–2017) focused on reducing the malnutrition level by half by 2017 with a special focus on the above states . However, our results showed the sluggish decline during 2005–16 and is highly unlikely to achieve the targets by the year 2017. In addition, the states with better socioeconomic indicators (Non-Empowered Action Group states like Maharashtra and Karnataka) have huge proportion of wasted children. Maharashtra has substantial proportion of underweight children higher than EAG states like Odisha and Assam. The district-level analysis revealed the clustering of child undernutrition at southern districts of Odisha and Chhattisgarh, northern districts of Odisha and southern districts of Jharkhand, northern districts of Bihar and northwestern districts of West Bengal, northern districts of Uttar Pradesh and boarder districts of Uttar Pradesh, Madhya Pradesh, Rajasthan, Maharashtra and Gujarat.
These regional variations in child undernutrition are a combination of different socioeconomic variations, feeding and dietary practices, and variation in implementation of different nutritional program like Integrated Child Development Programme (ICDS) . Some of the studies found an indirect relationship between access to ICDS services and undernutrition status of children in Indian states [2, 7, 19]. The utilization of ICDS services from 10 to 90% with high access to services among the states where malnutrition levels are lower and vice versa . The current decline in undernutrition in the EAG states is faster because of greater budgetary allocation through National Health Mission . However, the decline has been slow due to multiple factors associated to undernutrition.
The multivariate regression and scatter plot results indicated that multiple factors like use of clean fuel for cooking, use of iodized salt, mother’s education, GDP of the districts, feeding of breast milk and complementary foods are associated to different child nutrition indicators. It is found that the higher proportion of use of clean fuel is significantly associated with low stunting and underweight level of children which corroborates the findings of several other studies in India [3, 4]. Studies also showed that the indoor air pollution has significant association on child’s respiratory health which may lead to undernutrition among children [12, 28].
This was evident from previous studies that lack of use of adequately iodized salt is associated with significantly higher prevalence of malnutrition and child mortality (neonatal, infant and children aged < 5 year). However, this finding, being a cross-sectional study, does not necessarily infer the causal association between the use of iodized salt and malnutrition. Moreover, it suggested that adequately iodized salt fails to reach families who could potentially benefit the most [14, 27].
The regression result found appropriate breastfeeding practices and feeding practices are important for better nutrition among children. There are several studies indicating that inappropriate feeding practices can have greater consequences for the growth, development and survival of infants and children in Asian countries [8, 11, 26]. Foods are “gifts” of nature; human beings only cultivate the crops and rear or hunt for the animals as the case may be . Nonetheless, economic growth and industrialization in recent decades led to increased production of food in India. Private distributors can use their market power to achieve high penetration of beneficial foods and micronutrients by coupling the accessibility of commercial markets with comprehensive social marketing campaigns. The private sector also represents largely untapped financial and human resources that can be mobilized in support of nutrition aims. Efforts by private–public partnerships at the international level—e.g., the Alliance for a Green Revolution in Africa (AGRA -), or the Global Alliance for Improved Nutrition (GAIN)—can be replicated at national and subnational levels and used to promote local farming, involve local commercial outlets in the distribution of nutritious food products, or support other elements of the national nutrition strategy. Involving the private sector in efforts to achieve nutrition goals carries risks—e.g., the risk of undue corporate influence on public policy, the risk of distortions in the nutrition agenda toward activities of interest to the private sector, and others. These risks are especially worrisome in countries with weak government capacity, among them many of the countries with the highest burden of undernutrition. Some guidance is available now, emphasizing the importance of developing mandatory rather than voluntary codes of conduct, and the UN Standing Committee on Nutrition has established a working group to provide guidance to countries on private sector engagement in food and nutrition programs .
There is no magic technological bullet to solve the problem of undernutrition. Long-term investments in the role of women—through education, economic, social and political empowerment—can be a way to deliver sustainable improvements in maternal and child nutrition, and in the health of women and children more generally. The compelling logic of this scientific evidence is that governments need national plans to scale up nutrition interventions, systems to monitor and evaluate those plans, and laws and policies to enhance the rights and status of women and children .
This study provided cross-sectional ecological associations which is confounded by ecological fallacy and weak evidence for causality, however, temporal ecological data, being based on nationally representative serial cross-sectional studies, may provide robust evidence.
Geographic diversity in nutritional status is evident from NFHS 2015–2016 based state-level and district-level analysis. Severe undernutrition problem exists in majority of districts from central and western India. A significant number of factors found significant association with nutritional levels. Concerted efforts are required to address this variably existing public health problem through prevention model stressing on political lobbying and social policy action.
Availability of data and materials
All data generated or analyzed during this study are included in this published article and available at dhs.gov.in.
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This research received grant in terms of salary support from Nestlé Nutrition, India, for authors (RKP, MB, DKM).
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Prusty, R.K., Bairwa, M., Anwar, F. et al. Socio-biomedical predictors of child nutrition in India: an ecological analysis from a nationally representative Demographic and Health Survey, 2015–2016. J Health Popul Nutr 41, 1 (2022). https://doi.org/10.1186/s41043-021-00273-8