Table 1.
Table 1a. Demographic characteristics of the longitudinal study sample. | |||
---|---|---|---|
ASD | TDC | Total | |
Number of participants | 81 | 56 | 137 |
Age in yearsa, Mean (SD) | 18.5 (6.9) | 19.8 (7.3) | 19.0 (7.0) |
Age range | 6.3–38.9 | 6.9–39.8 | 6.3–39.8 |
Full Scale IQa Mean (SD) | 101.9 (16.4) | 117.3 (14.2) | 108.2 (17.3) |
Full Scale IQ range | 61–137 | 68–152 | 61–152 |
Verbal IQa Mean (SD) | 101.3 (23.5) | 116.1 (14.2) | 107.0 (21.5) |
Verbal IQ range | 58–138 | 84–140 | 58–140 |
Performance IQa Mean (SD) | 100.2 (16.8) | 112.2 (17.8) | 104.9 (18.1) |
Performance IQ range | 66–127 | 77–155 | 66–155 |
Processing speed assessments per participant, Mean (SD) | 1.6 (0.7) | 1.2 (0.4) | 1.4 (0.6) |
Participants with 1 Assessment | 43 | 45 | 88 |
Participants with 2 Assessments | 31 | 11 | 42 |
Participants with 3 Assessments | 7 | 0 | 7 |
Inter-Assessment Interval b (years), Mean (SD) | 6.0 (2.1) | 5.1 (0.7) | 5.9 (1.9) |
Table 1b. Demographic characteristics of the DTI longitudinal study subsample. | |||
---|---|---|---|
ASD | TDC | Total | |
Number of participants | 67 | 54 | 122 |
Age in yearsa, Mean (SD) | 20.4 (6.5) | 20.2 (7.1) | 20.3 (6.8) |
Age range | 10.6–36.9 | 6.9–39.8 | 6.9–39.8 |
Full Scale IQa Mean (SD) | 103.2 (15.8) | 117.6 (14.4) | 109.6 (16.8) |
Full Scale IQ range | 61–137 | 78–152 | 61–152 |
Verbal IQa Mean (SD) | 104.9 (21.4) | 113.2 (15.1) | 109.8 (18.2) |
Verbal IQ range | 58–138 | 84–140 | 58–140 |
Performance IQa Mean (SD) | 107.7 (15.5) | 113.7 (18.6) | 111.2 (17.5) |
Performance IQ range | 73–127 | 77–155 | 73–155 |
DTI scans per participant, Mean (SD) | 1.5 (0.5) | 1.3 (0.5) | 1.4 (0.5) |
Participants with 1 Scan | 44 | 43 | 86 |
Participants with 2 Scans | 23 | 11 | 36 |
Inter-Scan Intervalc (years), Mean (SD) | 5.4 (0.7) | 5.0 (0.8) | 5.2 (0.7) |
Defined as mean for each individual then averaged across each group.
Interval between Time 0, Time 1, and Time 3.
Interval between Time 1 and Time 3.