Table 1

Characteristics of the 34 infants at recruitment

Mean (SD) birth weight (g)3560 (410)
Mean (SD) gestational age (weeks)40.0 (1.4)
Mean (SD) maternal age (years)31.8 (3.3)
No of boys/girls17/17
No breast fed/formula fed27/7
Parity
 112
 213
 35
 44
Social class
 111
 28
 311
 44
Delivery
 Normal22
 Forceps7
 Caesarean section5