Most predictors apart from study setting (F (6,12) = 15.16, p < 0.001, R2 = 82.8%) did not reach statistical significance including mean age (F (1,12) = 1.83; p = 0.202; β = 0.46; 95% CI: -0.28, 1.19; R2 = 6%), diagnostic framework (F (6,12) = 1.35, p = 0.309, R2 = 10.6%) and geographic region (F (6,12) = 2.44, p = 0.089), indicating that sampling context explained a substantial proportion of between-study heterogeneity (Table 8 ).
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Global Autism Spectrum Disorder Prevalence Estimates and Associated Covariates: A Systematic Review and Meta-Regression Analysis.
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