| 1+NDDS flag | Infant Toddler Checklist | |||
|---|---|---|---|---|
| Expressive speech delay* | Other communication delays† | |||
| Yes | No | Yes | No | |
| Positive | 15 | 123 | 19 | 119 |
| Negative | 1 | 209 | 3 | 207 |
| Sensitivity (95% CI), % | 94 (70-100) | 86 (64-96) | ||
| Specificity (95% CI), % | 63 (58-68) | 63 (58-69) | ||
| Positive predictive value (95% CI), % | 11 (6-17) | 14 (9-21) | ||
| Negative predictive value (95% CI), % | 99 (97-100) | 99 (96-100) | ||
Note: 1+NDDS flag = 1 or more "no" responses on the Nipissing District Developmental Screen, CI = confidence interval.
*Need to monitor: expressive speech composite below the 10th percentile.
†Need for referral: social composite, symbolic composite or the total score below the 10th percentile.