TABLE 4.
Test properties of the Rourke Baby Record and the Nipissing District Developmental Screen (NDDS) compared with the Bayley Scales of Infant Development III (BSITD-III) (≤70)* at one and two flag† cut-points
| Sens | Spec | PPV | NPV | False positive | False negative | LR+ | Acc | |
|---|---|---|---|---|---|---|---|---|
| Rourke | ||||||||
| One flag | 100 | 72 | 20 | 100 | 28 | 0 | 3.6 | 74 |
| Two flags | 100 | 90 | 40 | 100 | 10 | 0 | 9.7 | 90 |
| NDDS | ||||||||
| One flag | 100 | 76 | 22 | 100 | 24 | 0 | 4.1 | 77 |
| Two flags | 100 | 93 | 50 | 100 | 7 | 0 | 14.5 | 94 |
Data presented as %, except for the likelihood ratio of a positive test (LR+).
*
A score of ≤70 (two SDs below the mean) on the BSITD-III was assessed to determine whether the test characteristics differed when using a more impaired definition of delay.
†
A ‘No’ response, indicating that the child did not demonstrate the skill, was termed a ‘flag’. Acc Accuracy; NPV Negative predictive value; PPV Positive predictive value; Sens Sensitivity, Spec Specificity