Background: Alterations in the spinal column and obesity are on the rise, causing great concern in health and educational strata. This paper aims to take a step further and study in detail the relationship of the presence of scoliotic hump in obese schoolchildren. Objective: was to determine the relationship between prevalence of types of variables hump and sociodemographic, anthropometric, and functional-side dominance. Methods: The sample consisted of 2,822 schoolchildren in Spain, analyzed in 2010 with an average age of 8.5 years (SD: 1.792). Analyzed for Adams test, BMI, Edinburgh inventory, deep flexion test, and demographic questionnaire, we used the SPSS 20.0 (descriptive and test multivariate binary logistic regression). Results: The number of subjects who had scoliosis was 1,023 (36.3[%]), obesity occurred in 359 (12.7[%]) cases, and after regression including associations regarding gender, (adjusted OR: 2.044; 1.731-2.413), age (adjusted OR: 1.121; 1.070-1.174), presence of obesity (adjusted OR: 0.676; 0.518-0.882), and flexibility (adjusted OR: 1.015; 1.001-1.029). Conclusions: The female participants were twice as likely to have hump. The prevalence with respect to age indicates that any schoolchild with a year of chronological age has 1.12 times higher risk of developing hump and subjects carrying the school supplies backpack have less risk of hump.