Table 2

Survival rates to 2 years of age, both overall and in 250 g birthweight subgroups, for ELBW live births free of lethal malformations in Victoria from the 1970s to the mid 2000s

1979–19801985–19871991–199219972005OR (95% CI)*p value
500–999 g
 Live births (n)3485604232262570.67 (0.45 to 0.99)0.045
 Survivors25.6 (89)37.9 (212)57.0 (241)75.2 (170)66.9 (172)
500–749 g
 Live births (n)1282231641051310.48 (0.29 to 0.82)0.006
 Survivors6.3 (8)9.4 (21)32.9 (54)62.9 (66)45.0 (59)
750–999 g
 Live births (n)2203372591211261.42 (0.66 to 3.07)0.37
 Survivors36.8 (81)56.7 (191)72.2 (187)86.0 (104)89.7 (113)
  • Data are % (n live births).

  • * For comparison of survival rates between 2005 and 1997; survival rate comparisons between previous eras reported previously.1