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ALSPAC and IGAP participant characteristics and ALSPAC IQ scores
| Sample | Number of | Males (%) | Age (years) | WISC-III (mean±standard deviation) | ||
| Participants | Verbal | Performance | Total | |||
| ALSPAC | 5,165 | 49.8 | 8.5 | 108.12 (16.56) | 100.23 (16.86) | 105.12 (16.17) |
| IGAP Cases | 17,008 | 35.1–40.6 | 68.5–82.7* | NA | NA | NA |
| IGAP Controls | 37,154 | 39.3–48.2 | 51.0–76.3** | NA | NA | NA |
NA, non-applicable. *Age range of time of onset across datasets. **Age range at time of examination across datasets.
