The study revealed that the overall prevalence of stunting is 36.5% (95%CI 33.8 to 39.3%) among the participating HHs. This finding is consistent with the mini DHS result in Amhara Region (42%) (18), East and West Gojjam zone of Amhara region (37.5%) (19). However, this result is lower than the prevalence reported from the previous study conducted in West Gojjam (43.5%) (20) and in Awi Zone (50%), Amhara region (21). According to the WHO’s classification, the prevalence of stunting in the study area is high (> 40% is very high, 30 to 39% is high, 20 to 29% is medium and < 20% is classified as a low prevalence(22). The variation in the prevalence of stunting in different studies may be attributed to a broad range of interrelated factors such as environmental or geographical factors (e.g. population density, rainfall and temperature variation and disease environment), socio-cultural differences in relation to child feeding and care practices, maternal under nutrition, HH food insecurity, economic growth and maternal education(19, 23–25).
This study found that significant variation of child stunting did not observe between irrigated and non-irrigated user. The finding of the study is inconsistent with previous studies, which showed that irrigation is associated with a reduced risk of stunting (26, 27). Studies revealed that irrigation schemes can ensure household food security (26, 27). Although food security may be a necessary prerequisite for good nutrition outcomes, it is insufficient by its own to improve nutritional outcomes (28). The nutritional status of children can be addressed by adopting a multi-sectorial approach (29, 30) and determined by mother knowledge on child nutrition practice, maternal nutritional status, intra household food allocation and utilization practices, and access to health services and healthy environmental conditions. For example, the head of the family gets first priority in eating while mothers and children get a smaller share of the family’s food relative to their nutritional need due to hierarchical position with intra-family food distribution (31). A study also revealed that some farmers using irrigation schemes engaged in market-oriented crops (32) which might not be necessary improve the nutritional status of children. Thus, further study is recommended to clearly understand the root cause of child malnutrition in the study area community.
Children aged > 12 months were found a significant association with child stunting compared to infants of less than one year in this study which is consistent with other studies (33, 34). This is obvious that symptom of stunting occurs after prolonged time if a child is being weaned off of exclusive breastfeeding, does not get adequate diet and proper care, and expose to inadequate environment health facilities such as house with poor hygiene, unsafe water supply and sanitation. Literature indicates improved behavioral practices such as hand washing before eating early on are important to consider along with other factors closely associated with the age of the child (33).
In this study, children whose mother had no ANC visit increase the odds of child stunting compared to multiple contacts during ANC visits which is consistent with previous studies (35, 36). Mothers who made frequent and regular contacts with health care provider get a chance for interactive health education sessions. Thus, multiple contacts during ANC enhance mother knowledge of appropriate feeding for their infants after delivery, including breastfeeding and feeding a diverse diet, and practice preventive and curative child care activities such as timely seeking of health care services, which in turn can have a positive effect on children’s nutritional status.
The result of this study indicated that male children were slightly more stunted than female children (53% and 47%, respectively) but not at a level of statistical significance, which is consistent with other findings (37, 38). There are studies which show males are at higher risk for stunting (39–42) whereas another study found that females are at higher risk for stunting (43). These sex-related differences may require further study, but seem to be less important than other factors that have been identified as affecting children’s nutritional status.
In this study, improved water supply and sanitation did not show a significant reduction in child stunting, however, hand washing practice with soap was one of the significant factors associated with a reduction in child stunting. Inconsistent findings on benefits of improved water supply and sanitation and hygiene in child stunting reduction were reported (33, 44, 45). Some studies showed a strong association between the level of environmental WASH (Water, Sanitation and Hygiene) and child linear growth (46, 47). The concept of a clean play and infant feeding area as an additional component of early child development programs along with WASH is one of the recommended strategies to reduce child stunting (47). The literature indicates that sanitation and water supply improvements, hand washing with soap, ensuring a clean play and infant feeding environment and food hygiene are all important to interrupt the multiple transmission pathways of fecal-oral pathogens (48). Better hygiene practices are essential to prevent diarrhea and other infections among children, which in turn contribute to reducing child stunting.
Previous studies on the association between improved drinking water stunting found inconsistent findings, while other studies have shown that the definition of “improved” does not reliably predict the microbiological safety of the water (49, 50). A study done by Ran et al. in rural India found that household access to an improved source of drinking water or piped water was not associated with child stunting (51). On the other hand, a study done by Fink et al. using the merged data set of 171 Demographic and Health Surveys found access to improved drinking water was associated with a lower risk of mild or severe stunting (52). A longitudinal study conducted in Peru by Checkleyet al. found that there was a positive association between improved water sources and reduction of child stunting only when it was accompanied by improved sanitation and water storage practices (53), so that multiple routes of transmission are addressed. A lack of synergistic effects of improved drinking water and sanitation was also found in a large prospective cohort study in Sudan (54). The possible reasons for this variation may be related with initial water quality at the source, and with water handling practices during collection, transport and storage at the household level. There is evidence that improved water sources do not correlate well with water that is safe for human consumption (55, 56) and that water quality deteriorates from source to point of consumption due to unsafe collection, transport, storage and handling practices (57, 58). Thus, further research is required to determine if an improved water source that fulfills the recommended quality standard for consumption, along with safe drinking water handling and storage practices, and the combined effect with improved sanitation, have independent or synergistic effects on child stunting.
The study has strengths and limitations. One strength is that this study employed multivariable logistic regression models to control confounding effect and determine the independent effect of irrigation users on child stunting. There might be a social desirability bias and a recall bias during answering of questions related to hygienic practices and events happening in the past, such as the child’s history of illness and child care practices. Moreover, information on some important confounding variables such as mothers’ nutritional status during pregnancy, parasitic infection and the child’s birth weight were not collected, and these could also have influenced children’s nutritional status. Interpretations of factors associated with child stunting should be with caution since a cause and effect relationship cannot be established using a cross-sectional study design.