Table 1.
Participant characteristics
| Iowa and national samples | North Carolina sample | ||||||
|---|---|---|---|---|---|---|---|
| Parent groups | Parent groups | Proband groups | |||||
| MIAF N = 215 | SIAF N = 62 | DWNS N = 53 | Autism N = 83 | Control N = 32 | Autism N = 36 | Control N = 38 | |
| Mean age (SD) | 40.2 (5.8) | 39.9 (5.9) | 39.6 (8.3) | 46.6 (6.8) | 46.2 (6.5) | 21.5 (5.5) | 23.3 (5.9) |
| Male/Female | 106/109 | 40/40 | 30/30 | 37/44 | 13/19 | 29/7 | 30/8 |
| Mean IQ (SD) | 105.2 (18.4) | 102.8 (15.2) | 113.1 (15.6) | 117.5 (11.2) | 122.1 (10) | 101.2 (18.1) | 107.9 (15.7) |
MIAF multiple incidence autism family, SIAF single incidence autism family, DWNS Down syndrome family, SD Standard Deviation