| 2+NDDS flag | Infant Toddler Checklist | |||
|---|---|---|---|---|
| Expressive speech delay* | Other communication delays† | |||
| Yes | No | Yes | No | |
| Positive | 8 | 46 | 16 | 38 |
| Negative | 8 | 286 | 6 | 288 |
| Sensitivity (95% CI), % | 50 (26-74) | 73 (50-88) | ||
| Specificity (95% CI), % | 86 (82-90) | 88 (84-92) | ||
| Positive predictive value (95% CI), % | 15 (7-28) | 30 (18-44) | ||
| Negative predictive value (95% CI), % | 97 (95-99) | 98 (95-99) | ||
Note: 2+NDDS flag = 2 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.