Table 5.
Measures for 60 Children with ASD Screened with the Infant-Toddler Checklist from 6 to 24 Months
| Age in Months when ITC was Completed |
||||||
|---|---|---|---|---|---|---|
| Measure | 6–8 | 9–11 | 12–14 | 15–17 | 18–20 | 21–24 |
| Sample Size | 5 | 13 | 11 | 17 | 13 | 19 |
| ITC | ||||||
| Age | 7.2 (1.2) | 10.3 (1.1) | 13.2 (0.9) | 16.4 (0.9) | 19.2 (0.8) | 23.2 (1.4) |
| Positive Screen | 20% | 77% | 91% | 100% | 92% | 95% |
| Parents with Concern | 40% | 31% | 45% | 53% | 69% | 74% |
| Social Compositea | 9.2 (4.4) | 6.5 (2.8) | 5.6 (2.6) | 5.4 (2.1) | 4.8 (2.3) | 4.2 (2.3) |
| Bottom 10th %ile | 20% | 62% | 82% | 82% | 85% | 79% |
| Speech Compositea | 9.4 (1.3) | 7.5 (2.9) | 6.1 (1.8) | 5.4 (2.1) | 5.5 (1.6) | 5.5 (2.0) |
| Bottom 10th %ile | 0% | 39% | 46% | 59% | 77% | 63% |
| Symbolic Compositea | 9.0 (2.6) | 7.3 (3.1) | 7.6 (2.8) | 7.0 (2.7) | 6.5 (2.5) | 5.4 (2.1) |
| Bottom 10th %ile | 20% | 39% | 46% | 59% | 46% | 58% |
| Totalb | 95.8 (17.7) | 82.0 (13.8) | 78.4 (8.5) | 75.4 (8.0) | 74.2 (7.1) | 71.1 (7.5) |
| Bottom 10th %ile | 20% | 46% | 73% | 77% | 92% | 90% |
| Behavior Sample | ||||||
| Age | 17.2 (2.1) | 18.0 (4.4) | 15.7 (2.9) | 18.3 (1.7) | 20.3 (1.0) | 23.8 (1.3) |
| Communication Delay | 60% | 77% | 82% | 100% | 92% | 100% |
| Social Compositea | 7.4 (2.7) | 5.4 (2.5) | 5.8 (2.4) | 4.9 (2.0) | 5.1 (1.8) | 4.0 (1.2) |
| Bottom 10th %ile | 40% | 77% | 82% | 88% | 85% | 100% |
| Speech Compositea | 9.0 (3.4) | 6.8 (3.0) | 7.2 (1.6) | 6.4 (2.8) | 5.6 (1.8) | 4.6 (1.8) |
| Bottom 10th %ile | 20% | 39% | 18% | 59% | 54% | 74% |
| Symbolic Compositea | 7.2 (3.7) | 6.1 (3.6) | 7.6 (2.8) | 6.6 (3.4) | 6.5 (3.1) | 4.4 (2.3) |
| Bottom 10th %ile | 60% | 62% | 46% | 65% | 62% | 79% |
| Totalb | 86.4 (17.2) | 76.3 (14.4) | 77.6 (9.6) | 75.5 (13.2) | 74.2 (10.9) | 68.5 (5.5) |
| Bottom 10th %ile | 40% | 77% | 73% | 71% | 85% | 95% |
| Mullen Scales | ||||||
| Age | 34.3 (5.0) | 43.0 (10.1) | 36.7 (1.8) | 38.8 (7.0) | 35.4 (9.6) | 40.9 (9.9) |
| Early Learning Compositeb | 106.8 (21.6) | 79.6 (31.0) | 87.4 (30.1) | 83.5 (32.2) | 74.9 (23.8) | 63.1 (15.7) |
| Bottom 10th %ile | 0% | 54% | 46% | 47% | 62% | 84% |
a
Standard Scores based on a M of 10 and SD of 3
b
Standard Scores based on a M of 100 and SD of 15