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Table 2 Distribution of all births and births of babies with DS, by year and maternal age group

From: Health behaviour modelling for prenatal diagnosis in Australia: a geodemographic framework for health service utilisation and policy development

  1998 1997–1999 2002 2000–2002
  Births (%) DS Births (%) Births (%) DS births (%)
  N = 61 080 N = 166 N = 61 883 N = 180
Maternal age group
0–34 81.6 64.5 78.6 53.3
35–36 8.9 7.8 9.7 13.9
37–39 6.9 15.7 8.2 17.8
40 plus 2.6 12.0 3.5 15.0
Total <37 90.5 72.3 88.3 67.2
Total 37 and over 9.5 27.7 *11.7 NS 32.8
  1. NS p = 0.30 for the difference in the proportion between 1998 and 2002
  2. * p < 0.001 for the difference in the proportion between 1998 and 2002