Differences in mean (SD) head circumference standard deviation scores between children with and without disability born before 25 completed weeks gestational age
| Severe disability | Other disability | No disability | Independent t tests: severe disability v rest* | |
|---|---|---|---|---|
| Values in the second sets of parentheses are number of infants. | ||||
| *Mean difference (95% confidence interval). | ||||
| †Excluding those with severe motor disability. | ||||
| ‡Excluding those with severe motor or sensory/communication disability. | ||||
| Motor | −3.04 (1.75) (28) | −1.49 (1.69) (38) | −1.40 (1.30) (211) | −1.63 SDS (−2.18 to −1.08),t = −5.82, p < 0.0001 |
| Sensory/communication† | −0.71 (2.04) (8) | −1.68 (1.37) (63) | −1.34 (1.32) (178) | +0.72 SDS (−0.24 to 1.68),t = 1.47 p = 0.14 |
| Development‡ | −1.88 (1.52) (27) | −1.56 (1.36) (74) | −1.28 (1.27) (140) | −0.51 SDS (−1.68 to 0.03)t = −1.47, p = 0.063 |