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. Author manuscript; available in PMC: 2023 Sep 1.
Published in final edited form as: Am J Med Genet B Neuropsychiatr Genet. 2022 Nov 15;192(1-2):3–12. doi: 10.1002/ajmg.b.32922

Table 1. Sample characteristics.

Cohort Phenotype(s) measured Scale(s) Sample size Covariates included in regression model
ALSPAC ADHD symptoms, internalizing problems, social problems SDQ 5,025 10 genetic PCs, age, sex
CATSS ADHD symptoms, internalizing problems A-TAC, SCARED 7,284 10 genetic PCs, sex
NTR ADHD symptoms, internalizing problems, social problems ASEBA-CBCL 3,652 10 genetic PCs, genotyping chip, age, sex
TEDS ADHD symptoms, internalizing problems, social problems SDQ 4,578 10 genetic PCs, genotyping chip, genotyping batch, age, sex

Abbreviations: ALSPAC, Avon Longitudinal Study of Parents and Children; ASEBA, Achenbach System of Empirically Based Assessment (Achenbach, 2014); A-TAC, Autism-Tics, AD/HD and other comorbidities inventory (Larson et al., 2010); CATSS, Child and Adolescent Twin Study in Sweden; CBCL, Child Behavior Checklist (Achenbach, 2014); NTR, Netherlands Twin Register; PCs, principal components; SCARED, Screen for Child Anxiety Related Emotional Disorders (Birmaher et al., 1997); SDQ, Strength and Difficulties Questionnaire (Goodman, 1997); TEDS, Twins Early Development Study.