Mexican schoolchildren are among the individuals most affected by obesity in the world. It has been observed that body-image dissatisfaction has increased in children. We evaluated their body weight perception and its relationship with actual weight; we compared this variable on three different scales according to age and sex and determined the sensitivity and specificity of these scales. This cross-sectional study was conducted with students from public and private schools in Northeastern Mexico. Boys and girls aged 6–12 years (n = 533) were included in this study. To assess the body weight perception, the following scales were used: (A) Collins (figure rating scale), (B) Eckstein (parents’ perceptions of their child’s weight and health scale), and (C) Truby and Paxton (children’s body image scale). Agreement was evaluated using the Cohen’s kappa test, determining the sensitivity and specificity. Girls and children aged 10–12 years were more likely to perceive themselves adequately (their self-perception corresponds to the figure that indicates their weight status). The children showed increased body-image distortion in the three scales. In terms of sensitivity and specificity, children with overweight or obesity were more precisely identified in scale A, whereas a healthy weight was more clearly identified in scale C.

The degree to which social determinants of health differ between indigenous migrants and non-indigenous people born and raised locally is currently unknown. We compared social determinants of health between indigenous migrants and non-indigenous people from urban north-eastern Mexico. Additionally, we ranked priorities for addressing the negative social determinants of health. This was a population-based comparative cross-sectional study (n = 235 indigenous migrants and 168 non-indigenous people). A two-stage non-random sampling was carried out from June to August of 2019. Heads of households ≥18 years and those with the ability to communicate in Spanish were recruited house by house. Structural and intermediary determinants of health were identified according to the World Health Organization Conceptual Framework and priorities were ranked using Z-scores. Being a migrant indigenous increased 1.6 times the odds of low education (95% CI = 1.1, 2.4). In addition, the migrant indigenous status increased the odds of poor housing, unhealthy behaviour and low social cohesion (p < 0.05). Housing, behaviours and health service accessibility were top priorities for indigenous migrants and structural determinants for non-indigenous people. The findings show that the right to access the social determinants of health has not yet been guaranteed for indigenous communities.