Table 2

Proportions of records of births in 2005 and 2006 at each quality assurance stage for live, singleton births born in National Health Service (NHS) hospitals to mother’s living in England

Stage of quality assuranceTotal20052006
nn%n%
1Number of births*1 170 790575 56849.2595 22250.8
2Number of ONS birth records linked to HESID1 148 110563 96349.1584 14750.9
3Number of ONS birth records not linked to HESID22 68011 60551.211 07548.8
4Number of ONS birth records linked to HESID and HES birth record1 074 571530 58649.4543 98550.6
5Number of ONS birth records linked to HESID but not linked to HES birth record96 21944 98246.751 23753.3
6Number of ONS birth records linked to one HES birth record before QA1 074 571530 58649.4543 98550.6
7Number of links broken between ONS birth records and HES birth records after QA145689061.156638.9
8Number of ONS birth records linked to one HES birth record after QA1 073 115530 11949.4542 99650.6
% of total ONS birth records left linked to one HES birth record after QA91.792.191.3
9Total number of ONS birth records not linked to HES birth record after QA97 67545 81046.951 86553.1
% of total ONS birth records not linked to HES birth record after QA8.37.98.7
  • *Birth registration linked to birth notification records of live, singleton births that occurred in NHS hospitals to women residing in England

  • HES, Hospital Episode Statistics; HESID, HES identifiers; ONS, Office for National Statistics; QA, quality assurance.