Resumo A funcionalidade familiar tem mostrado sua relevância no desenvolvimento integral dos adolescentes, sendo a conectividade escolar um aspecto muito importante. Para determinar a associação entre funcionamento familiar e conectividade escolar em adolescentes mexicanos do Ensino Médio, foi realizado um estudo transversal analítico em um censo de 396 adolescentes em uma escola pública no México. Foram utilizados o autorrelato de funcionamento familiar e a escala de conectividade escolar, ambos com α > 0,84. ꭕ2 e ANOVA foram aplicados. Os resultados mostram diferenças significativas no conflito com turno (ꭕ2 da manhã = 42,47 vs. ꭕ2 da noite = 40,35, F = 4,57, p = 0,033) e liderança com grau (1º ꭕ2 = 8,14, 2º ꭕ2 = 8,97, 3º ꭕ2 = 8,90, F = 3,52, p = 0,030). Conectividade associada a variáveis escolares (p < 0,05). Não há diferenças ou associação entre sexo, idade ou qualificações com conectividade. O funcionamento familiar foi associado na expressão afetiva com a escola (ꭕ2 = 3,77, p = 0,055) e na liderança com os alunos (ꭕ2 = 2,92, p = 0,05). Conclui-se que a liderança dos pais e a expressão afetiva da família favorece a conectividade escolar entre os alunos e com sua escola.

Abstract Family functionality has shown its relevance in the comprehensive development of adolescents, with school connectivity being a very important aspect. To determine the association between family functioning and school connectivity in Mexican high school adolescents, an analytical cross-sectional study was carried out in a census of 396 adolescents in a public high school in Mexico. The self-report of family functioning and the school connectedness scale were used, both with α > 0.84. ꭕ2 and ANOVA were applied. The results show significant differences in conflict with shift (morning ꭕ2 = 42.47 vs. evening ꭕ2 = 40.35, F = 4.57, p = 0.033), and leadership with degree (1st ꭕ2 = 8.14, 2nd ꭕ2 = 8.97, 3rd ꭕ2 = 8.90, F = 3.52, p = 0.030). Connectivity associated with school variables (p < 0.05). There are no differences or association between sex, age or qualifications with connectivity. Family functioning was associated in affective expression with school (ꭕ2 = 3.77, p = 0.055) and in leadership with students (ꭕ2 = 2.92, p = 0.05). It is concluded that the leadership of the parents and the affective expression of the family favors school connectivity between students and with their school.

ABSTRACT Introduction Mexico ranks second in the world in childhood obesity. The impact of obesity on comprehensive health is evident; however, the evidence of its influence on academic performance in Mexican adolescents is still scarce. Objective: to compare the academic performance of high school students based on their Body Mass Index (BMI). Material and Methods Cross-sectional study in a probabilistic sample of 156 students. Weight and height were taken and BMI was classified according to the criteria of the World Health Organization (WHO). The average grade was used to measure academic performance. Descriptive statistics and Chi-square were applied to compare groups. Results 50% women; the mean age was 13.1 years (DT=0.94). 32.7% were obese, 19.2% overweight and 48.1 % normal weight. The mean score was 8.6 (DT=0.82), 42.3% had a high performance, 38.5% an average performance and 19.2% a low performance. High performance was more frequent in the obesity group (40.9%), followed by normal weight (36.4%) and overweight (22.7%). When comparing the academic performance in the groups by BMI, statistical differences were found (p=0.01). Conclusions The prevalence of overweight and obesity is higher than the national average. There are differences in academic performance. Adolescents with obesity had a higher school performance.

Resumen Introducción México ocupa el segundo lugar del mundo en obesidad infantil. El impacto de la obesidad sobre la salud integral es evidente; sin embargo, la evidencia de su influencia sobre el rendimiento académico en adolescentes mexicanos es todavía escasa. Objetivo: comparar el rendimiento académico de estudiantes de secundaria en función de su Índice de Masa Corporal (IMC). Material y Métodos Estudio transversal en muestra probabilística de 156 estudiantes. Se tomó peso y talla y se clasificó el IMC según los criterios de la Organización Mundial de la Salud (OMS). Para medir el rendimiento académico se utilizó la calificación promedio. Se aplicó estadística descriptiva y Chi-cuadrado para comparar grupos. Resultados 50% mujeres; la media de edad fue de 13,1 años (desviación típica [DT]=0,94). El 32,7% presentaron obesidad, el 19,2% sobrepeso y el 48,1% peso normal. La media de calificación fue 8,6 (DT=0,82), el 42,3% tenía un rendimiento académico alto, el 38,5% un rendimiento medio y el 19,2% un rendimiento bajo. El rendimiento alto fue más frecuente en el grupo de obesidad (40,9%), seguido de peso normal (36,4%) y sobrepeso (22,7%). Al comparar el rendimiento académico en los grupos por IMC, se encontraron diferencias estadísticas (p=0,01). Conclusiones La prevalencia de sobrepeso y obesidad es más alta que la media nacional. Existen diferencias en el rendimiento académico en función del IMC. Los adolescentes con obesidad presentaron un rendimiento escolar más alto.