TABLE 4.
Bayley Scales of Infant Development 2 Developmental and Composite Outcomes at 18 to 22 Months of Age, Corrected for Prematurity
| Epoch 1, Total | Epoch 2, Total | Pa | Epoch 1 |
Epoch 2 |
|||
|---|---|---|---|---|---|---|---|
| ≤23 wk | 24 wk | ≤23 wk | 24 wk | ||||
| MDI, nb | 374 | 384 | 89 | 285 | 102 | 282 | |
| MDI < 70, n (%) | 168 (44.9) | 196 (51.0) | .107 | 52 (58.4) | 116 (40.7) | 63 (61.8) | 133 (47.2) |
| MDI < 50, n (%) | 60 (16.0) | 66 (17.2) | NS | 21 (23.6) | 39 (13.7) | 26 (25.5) | 40 (14.2) |
| PDI, nb | 369 | 384 | — | 88 | 281 | 104 | 280 |
| PDI < 70, n (%) | 103 (27.9) | 134 (34.9) | .047 | 31 (35.2) | 72 (25.6) | 46 (44.2) | 88 (31.4) |
| PDI < 50, n (%) | 59 (16.0) | 73 (19.0) | NS | 23 (26.1) | 36 (12.8) | 27 (26.0) | 46 (16.4) |
| Neurodevelopmental impairment, n/N (%) | 186/371 (50.1) | 227/387 (58.7) | .023 | 57/89 (64.0) | 129/282 (45.7) | 72/103 (69.9) | 155/284 (54.6) |
| Profound impairment, n/N (%) | 63/376 (16.8) | 67/383 (17.5) | NS | 21/89 (23.6) | 42/287 (14.6) | 27/102 (26.5) | 40/281 (14.2) |
| Unimpaired/minimally impaired, n/N (%) | 82/376 (21.8) | 85/389 (21.9) | NS | 8/89 (9.0) | 74/287 (25.8) | 14/104 (13.5) | 71/285 (24.9) |
a
P values pertain to comparisons of all epoch 1 versus epoch 2. P values of >.2 are reported as not significant (NS).
b
Because of acute illness, language, behavioral problems, sensory impairment, and other reasons, there were 37 children without an MDI and 42 children without a PDI in epoch 1 and 21 children without an MDI and 21 children without a PDI in epoch 2.