Neurological impairments at 8 years of age in regional ELBW cohorts compared over three distinct eras
| 1979–80, n = 87 | 1985–87, n = 206 | 1991–92, n = 224 | |
|---|---|---|---|
| *Change in cerebral palsy rate over time, χ2trend = 1.5, p = 0.22, NS; †change in blindness rate over time, χ2trend = 6.2, p = 0.013; ‡change in deafness rate over time, χ2trend = 1.2, p = 0.27, NS; §WISC-R; ¶WISC-III; **severity of intellectual impairment in 1985–87 compared with 1979–80, χ2trend = 1.1, p = 0.29, NS; ††severity of intellectual impairment in 1991–92 compared with 1979–80, χ2trend = 0.1, p = 0.74, NS; ‡‡severity of intellectual impairment in 1991–92 compared with 1985–87, χ2trend = 0.6, p = 0.44, NS; NS, not significant. | |||
| Cerebral palsy, n (%) | 6 (6.9) | 16 (7.8) | 24 (10.7)* |
| Blindness, n (%) | 6 (6.9) | 5 (2.5) | 3 (1.1)† |
| Deafness, n (%) | 4 (4.6) | 1 (0.5) | 4 (1.5)‡ |
| Full scale IQ, mean (SD) | 96.3§ (15.0), n = 77 | 94.2¶ (16.9), n = 192 | 94.9¶ (15.8), n = 209 |
| Intellectual impairment, severity | |||
| Nil, n (%) | 44 (50.6) | 118 (57.3)** | 131 (58.5)††‡‡ |
| Mild, n (%) | 29 (33.3) | 56 (27.2) | 56 (25.0) |
| Moderate, n (%) | 5 (5.7) | 21 (10.2) | 18 (8.0) |
| Severe, n (%) | 9 (10.3) | 11 (5.3) | 19 (8.5) |