A Comprehensive Overview of the Physical Health of the Adolescent Brain Cognitive Development Study Cohort at Baseline.

Chi-squared tests ( Supplementary Table 57 ) also showed highly significant associations between sports involvement and sociodemographic factors of race [χ 2 (3, 8593) = 281, p = 1.06e-60], ethnicity [χ 2 (1, 8593) = 81.8, p = 1.49e-19], household income [χ 2 (2, 8593) = 850, p = 2.11e-185], and parental education [χ 2 (4, 8593) = 870, p = 4.37e-187], in that families with a higher household income and greater parental educational attainment were more likely to endorse participation.

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The association with pubertal development showed a trend toward significance [χ 2 (3, 8593) = 17.7, p = 0.0005] such that those in pre-pubertal stages were more likely to meet guidelines and those in the middle pubertal stage were less likely to meet guidelines.

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