Table II.
Bayley-2 Index and Bayley-3 Composite and scaled scores (children scoring above the basal score threshold of each test)
| Bayley-2 and Bayley-3 scores | Median (range) | Mean (SD) |
|---|---|---|
| Bayley-2 Mental Developmental Indexa | 93 (50–121) | 91 (17) |
| Bayley-3 Cognitive Compositea | 100 (65–125) | 102 (12.3) |
| Bayley-3 Language Compositea | 97 (68–135) | 99 (14.3) |
| Bayley-3 Cognitive and Language Compositea | 100 (74–122) | 100 (12) |
| Bayley-2 Psychomotor Developmental Indexb | 85 (59–107) | 85 (12.5) |
| Bayley-3 Motor Compositeb | 103 (76–124) | 101 (12.6) |
| Bayley-3 modified Motor Compositeb | 99 (76–121) | 98 (11.6) |
| Bayley-3 Gross Motor Scaled Scoreb | 9 (4–11) | 9 (2) |
| Bayley-3 Fine Motor Scaled Scoreb | 12 (4–17) | 11 (2.9) |
a n=57; b n=56. BSID, Bayley Scales of Infant Development.