Table 2
Ascertainment problems and incidence of disability at 6 years (1983 population based cohort of babies born before 32 weeks of gestation)
| Follow up | Babies surviving to discharge n= | Intelligence quotient less than 752-150 n= | Severe sensorimotor disability n= | Severe sensorimotor or cognitive disability | |||||
|---|---|---|---|---|---|---|---|---|---|
| n= | % | (95% CI) | |||||||
| Child reviewed without difficulty at 2 and 6 years | 203 | 10 | 12 | 17 | 8.4 | 5.0 to 13.1 | |||
| Child only traced at 2 with difficulty (family mobility, etc) | 14 | 0 | 3 | 3 | 21.4 | 4.7 to 50.8 | |||
| Assessment at 2 only arranged with difficulty after the child was traced2-152 | 12 | 3 | 5 | 5 | 41.7 | 15.2 to 72.3 | |||
| Died after discharge from hospital but before the age of six | 7 | 22-151 | 28.6 | 3.7 to 71.0 | |||||
| Total | 236 | 27 | 11.4 | 7.4 to 15.5 | |||||
