Table 1.
Description of the Utah autism spectrum disorder (ASD) families.
| Type of family | No. of families | Average No. of generations; standard deviation (SD; range) | Total subjects | Average No. of subjects per family; SD (range) | Total ASD subjects | Average No. of ASD subjects per family; SD (range) | Total No. of subjects with SRS | Average No. of subjects per family with SRS (range) |
|---|---|---|---|---|---|---|---|---|
| Large (6-9 generations) | 19 | 7.89; 0.66 (6 to 9) | 328 | 17.26; 12.92 (5 to 50) | 81 | 5.22; 2.54 (2 to 9) | 254 | 13.37; 10.32 (4 to 40) |
| Moderate (4 generations) | 6 | 4; 0.00 (4) | 85 | 14.17; 11.34 (6 to 32) | 21 | 4.00; 3.39 (2 to 9) | 70 | 11.67; 10.21 (3 to 27) |
| Small (2-3 generations) | 39 | 2.28; 0.46 (2 to 3) |
216 | 5.54; 2.40 (2 to 11) |
79 | 2.05; 0.57 (1 to 3) | 194 | 4.97; 2.11 (2 to 11) |
| Full sample | 64 | 629 | 181 | 518 | ||||
SRS, Social Responsiveness Scale.