TABLE 1

Aetiology of the PCHI in our series, and in series from the UK Trent region14 for comparison.

Aetiology

Glasgow (%)

Trent (%)

Family history

31

}     45

Unknown, presumed genetic

12

Craniofacial abnormalities

12

3

Perinatal acquired (NICU)

15

17

Prenatal acquired

3

4

Postnatal acquired

7

6

Insufficient data

16

25