Cost-benefit analysis of WASH (water, sanitation, and hygiene) interventions have traditionally focused on two primary benefits: improved health outcomes, usually measured as reduced diarrheal disease incidence, and reduced time burdens from collecting water, treating water, or traveling to open defecation or shared sanitation sites. However, there are also many other important benefits of water, sanitation, and hygiene interventions for policymakers and researchers to consider, such as improved nutrition and decreased stunting, improved cognitive development and educational attainment, and quality-of-life improvements for women.
Reduced fecal exposure from improved WASH may decrease not only diarrheal disease incidence but also the risk of environmental enteropathy, a condition that reduces the nutritional absorptive capacity of the gut. Environmental enteropathy results in a range of outcomes associated with malnutrition, such as wasting, stunting, and anemia. A growing body of literature has explored the direct relationship between improved sanitation environments and stunting. There are mixed findings from these research studies, suggesting that intervention adherence and baseline sanitation conditions may be important to realizing any potential stunting benefits. The economics literature has documented a strong inverse relationship between childhood stunting and lifetime earnings.
Reduced absorptive capacity from environmental enteropathy may also hinder cognitive development in children. Recent research documents a strong relationship between improved sanitation environments and cognitive development in children, though some studies find no relationship. Beyond cognition, improved health from reduced fecal exposure may also affect a child’s ability to attend school, and research shows a relationship between WASH environments and school attendance and enrollment. Monetizing the benefits of improved schooling in a low-income country context is challenging due to high variation in school quality as well as high rates of self-employment.
Quality-of-life benefits for women are a third category of benefits that are often omitted from WASH cost–benefit analyses. Mostly qualitative research highlights that poor sanitation and water insecurity is associated with safety, security, privacy, and dignity concerns for women. While these concerns and experiences are difficult to quantify in many cases, they should not be ignored when considering WASH benefits.
Article
The Evidence Base for Cognitive, Nutrition, and Other Benefits From Water, Sanitation, and Hygiene Interventions
Jennifer Orgill-Meyer
Article
Rebooting Education: A Keystone to Ending Racial and Ethnic Minority Health Disparities
William A. Vega and Esther J. Calzada
Undermining educational attainment at any stage is a threat to life course health. A strong educational platform is required for adequate human development in the 21st century because it provides a foundation for lifelong knowledge, skills, and competencies that protect health. The importance of educational attainment for health has been acknowledged but remains understudied as an interdisciplinary issue. In US American society, unequal educational opportunity is a historical reality and is reflected in health disparities among African American and Latinx populations over the life span. Reform efforts have been initiated for decades, yet gains in educational attainment show limited progress and wide disparities in lifetime health persist. Educational attainment is a fundamental social determinant of health because it leverages higher income, improves the management of other social determinants of health, improves social skills, improves occupational life chances, and extends life expectancy. The reverse is also true. Low educational attainment that is intergenerational imperils human development by failing to prepare youth with the capabilities to overcome structural disadvantages and poverty, which themselves imperil development. African American and Latinx populations in the United States, who together represent nearly 100 million people and who will be the largest component of the majority-minority American population by the year 2046, confront a web of aversive social determinants, including poverty in de facto segregated communities, violence and trauma, toxic exposures, poorly compensated and often temporary employment, a lack of universal health insurance, racism, and sexism in their daily lives. Clearly, there are social, biologic, and psychological issues associated with the educational attainment and health gradient, and early childhood learning experiences represent a critically important opportunity for human potential by advancing cognitive performance, problem-solving ability, motivation to learn, and overall structural and functional brain development. Families from low educational attainment backgrounds experience the negative impacts of social determinants in their daily lives, and their children’s life chances are diminished by poorly funded schools with ineffective educational programs. Putative causes and potential responses to overcoming the historical problem of neglect have been identified, and there are promising efforts at educational system reform aiming to promote health with effective programs and comprehensive strategies that will close the gaps in educational attainment.
