Table 1

Maternal information

  • Based on 6186 mothers; inborn infants born between 1 May 1991 and 31 December 1993 with birth weights from 501 to 1500 g. Data are presented as percentages with centre ranges in parentheses.

  • 1-150 Defined as at least one prenatal visit.

  • ROM, Rupture of membranes.