Stunting in indigenous Waorani children living near the oil-extraction sites: What can the determinants of health tell us about this?

The Waorani are a recently contacted indigenous group inhabiting oil extraction territories in the Amazon. This study aimed to analyse the prevalence of stunting and explore its association with health determinants in Waorani children under 5 years of age. A cross-sectional study was conducted with 102 children. Mothers were surveyed about biological, socioeconomic, environmental and health service determinants. Bivariate, multivariate and weight-adjusted logistic regression models were performed. A total of 39.2% of the children exhibited stunting. Health determinants such as male sex (OR = 2.73, 95% CI: 1.63-4.64), short maternal stature (OR = 4.96, 95% CI: 2.38-10.84), child age (OR = 1.04, 95% CI: 1.02-1.05), reduced dietary diversity (OR = 2.37, 95% CI: 1.27-4.53) were associated with a higher prevalence of stunting. Prenatal care was also associated with stunting (OR = 1.59, 95% CI: 1.16-2.21, for two or more checkups), with a potential reverse causality effect. Tall birth height (OR 0.28, 95% CI: 0.13-0.57) was associated with a lower prevalence of stunting. No socioeconomic differences were found related to stunting. The health determinants model may have limitations in socioeconomically homogeneous populations. Stunting prevention policies should take this model into account, contextualised to the specific territory.