Table 1. Properties of the individuals subjected to GWAS in this study.
| Recruiting center | Number of Cases | Number of Controls | Total number of participants | Mean Age (±SD) | Females (%) | Genotyping array |
|---|---|---|---|---|---|---|
| UiB | 300 | 205 | 505 | 29.88 (9.14) | 55.84 | B |
| MoBa/Preschool ADHD (NIPH) | 104 | 243 | 347 | 3.46 (0.12) | 46.40 | H |
| MoBa/Preschool ADHD (NIPH) | 74 | 156 | 230 | 3.48 (0.11) | 49.57 | B |
| UiO controls | none | 191 | 191 | 31.65 (18.09) | 52.08 | H |
| none | 85 | 85 | 65.22 (9.21) | 54.02 | B | |
| Total | 478 | 880 | 1358 |
Genotyping array B refers to Human OmniExpress-12v1-1_B (Illumina, San Diego, CA, USA) and genotyping array H refers to Human OmniExpress-12v1_H (Illumina, San Diego, CA, USA). SD refers to standard deviation, UiB refers to University of Bergen and UiO refers to University of Oslo.