Table 22: Increased risk screening results for trisomy 21, 18 and 13 by trimester of screen, January 2011 to December 2015 Year Total increased Positive test T1 results with Positive T2 results with Positive risks for rate per 100 increased risk test rate increased risk test rate specified screens for specified per 100 T1 for specified per 100 T2 trisomy trisomy screens trisomy screens Trisomy 21 2011 1,081 2.8 868 2.5 213 4.8 2012 1,144 2.8 871 2.4 273 5.5 1,081 2.7 840 2.4 241 4.6 2013 1,131 2.7 870 2.4 261 4.8 2014 1,140 2.7 937 2.6 203 3.7 2015 Trisomy 18 134 0.3 123 0.4 11 0.2 2011 161 0.4 149 0.4 12 0.2 2012 145 0.4 125 0.4 20 0.4 2013 136 0.3 120 0.3 16 0.3 2014 145 0.3 127 0.3 18 0.3 2015 Trisomy 13 143 0.4 140 0.4 3 0.1 2011 169 0.4 161 0.5 8 0.2 2012 158 0.4 144 0.4 14 0.3 2013 149 0.4 135 0.4 14 0.3 2014 159 0.4 147 0.4 12 0.2 2015 Any one or more of trisomy 21, 18 or 13 1,099 2.8 878 2.5 221 5.0 2011 1,156 2.8 874 2.4 282 5.7 2012 1,103 2.7 847 2.4 256 4.9 2013 1,157 2.8 883 2.4 274 5.0 2014 1,163 2.8 942 2.6 221 4.0 2015
Table 22: Increased risk screening results for trisomy 21, 18 and 13 by trimester of screen, January 2011 to December 2015 Year Total increased risks for specified trisomy Positive test rate per 100 screens T1 results with increased risk for specified trisomy Positive test rate per 100 T1 screens T2 results with increased risk for specified trisomy Positive test rate per 100 T2 screens Trisomy 21 2011 1,081 2.8 868 2.5 213 4.8 2012 1,144 2.8 871 2.4 273 5.5 2013 1,081 2.7 840 2.4 241 4.6 2014 1,131 2.7 870 2.4 261 4.8 2015 1,140 2.7 937 2.6 203 3.7 Trisomy 18 2011 134 0.3 123 0.4 11 0.2 2012 161 0.4 149 0.4 12 0.2 2013 145 0.4 125 0.4 20 0.4 2014 136 0.3 120 0.3 16 0.3 2015 145 0.3 127 0.3 18 0.3 Trisomy 13 2011 143 0.4 140 0.4 3 0.1 2012 169 0.4 161 0.5 8 0.2 2013 158 0.4 144 0.4 14 0.3 2014 149 0.4 135 0.4 14 0.3 2015 159 0.4 147 0.4 12 0.2 Any one or more of trisomy 21, 18 or 13 2011 1,099 2.8 878 2.5 221 5.0 2012 1,156 2.8 874 2.4 282 5.7 2013 1,103 2.7 847 2.4 256 4.9 2014 1,157 2.8 883 2.4 274 5.0 2015 1,163 2.8 942 2.6 221 4.0
antenatal-screening-down-syndrome-other-conditions-monitoring-jan2011-dec2015-may17.docx