Table 4.
Proportion of Infants With and Without DPa Scoring in the “Delayed” Range (Standard Score <85) Relative to BSID-III Norms
| BSID-III Domain | Delayed (Standard Score <85), % |
Adjusted Relative Risk (95% CI)b |
|
|---|---|---|---|
| Children With DP |
Children Without DP |
||
| Time 2 differences | |||
| Cognitivec | 8.3 | 0.6 | 13.8 (1.8–105.5) |
| Languagec | 18.5 | 6.1 | 3.9 (1.6–6.2) |
| Motorc | 6.0 | 1.8 | 3.2 (1.1–13.1) |
| Adaptive behaviord | 11.0 | 6.1 | 1.8 (0.9–3.8) |
Abbreviations: See Table 3.
Standard scores for the cognitive, language, motor, and adaptive behavior composite scales have a normative mean (SD) of 100 (15). Scaled scores for the receptive language, expressive language, fine motor, and gross motor subscales have a normative mean (SD) of 10 (3).
Data were dropped for 2 children in the DP group who did not have evidence of DP based on physician ratings of 3-dimensional head photographs and 69 children in the non-DP group who had mild or greater posterior skull flattening or asymmetry. Data were also excluded for 7 children with DP and 2 without DP who were diagnosed as having medical conditions with developmental implications after study enrollment.
Scores rated as invalid by the examiner were excluded from analyses. At time 2, cognitive scores were rated as invalid for 1 child with DP, language scores were rated as invalid for 2 children with DP, and motor scores were rated as invalid for 2 children with DP.
Adaptive behavior data were missing for 23 children with DP and 13 without DP at time 2. Another 2 children with DP and 2 without DP were not seen for a clinic assessment, and only parent-reported adaptive behavior data were available.