Table 2.
Estimates of Positive and Negative Predictive Value for the Infant-Toddler Checklist Compared to Communication on the Behavior Sample
| 6 to 8 months |
9 to 11 months |
12 to 14 months |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Communication |
Communication |
Communication |
||||||||||
| ITC Screen |
Delayed |
Typical |
ITC Screen |
Delayed |
Typical |
ITC Screen |
Delayed |
Typical |
||||
| Positive | 6 | 8 | 14 | Positive | 54 | 22 | 76 | Positive | 98 | 36 | 134 | |
| Negative | 11 |
75 |
86 |
Negative | 12 |
171 |
183 |
Negative | 2 |
194 |
196 |
|
| 17 | 83 | 100 |
66 | 193 | 259 |
100 | 230 | 330 |
||||
| Age at ITC | 7.6 (1.0) | 10.7 (1.0) | 13.1 (1.0) | |||||||||
| Age at Behavior Sample | 16.5 (3.3) | 16.9 (3.5) | 16.6 (3.1) | |||||||||
| Positive Predictive Value | 42.9% | 71.1% | 73.1% | |||||||||
| Negative Predictive Value | 87.2% | 93.4% | 99.0% | |||||||||
| 15 to 17 months |
18 to 20 months |
21 to 24 months |
||||||||||
| Communication |
Communication |
Communication |
||||||||||
| ITC Screen |
Delayed |
Typical |
ITC Screen |
Delayed |
Typical |
ITC Screen |
Delayed |
Typical |
||||
| Positive | 79 | 33 | 112 | Positive | 65 | 19 | 84 | Positive | 49 | 13 | 62 | |
| Negative | 7 |
119 |
126 |
Negative | 14 |
121 |
135 |
Negative | 8 |
58 |
66 |
|
| 86 | 152 | 238 |
79 | 140 | 219 |
57 | 71 | 128 |
||||
| Age at ITC | 16.2 (0.9) | 19.3 (.09) | 22.8 (1.2) | |||||||||
| Age at Behavior Sample | 18.8 (2.4) | 20.8 (1.7) | 23.4 (1.2) | |||||||||
| Positive Predictive Value | 70.5% | 77.4% | 79.0% | |||||||||
| Negative Predictive Value | 94.4% | 89.6% | 87.9% | |||||||||