Summary of included papers
| Author | Year | Number of requests made | Number of questions/request* | Years of data requested | Number of full data responses | Number of data† |
|---|---|---|---|---|---|---|
| Grewal et al5 | 2013 | 179 | 7 | 2012 | 175 | 1225 |
| Matthew et al6 | 2013 | 1 | 1 | 1995–2009 | 1 | 1253 |
| Gulati et al7 | 2012 | 1 | 1 | 1995–2010 | 1 | 318 |
| Milligan et al8 | 2011 | 1 | 1 | 2005–2009 | 1 | 768 |
| Gan9 | 2012 | 299 | 5 | 2008/2009, 2009/2010, 2010/2011 | 247 | 3705 |
| The Royal College of Surgeons of England10 | 2010 | 164 | 3 | 2007–2009 | 96 | 288 |
| Raine11 | 2011 | 1 | 1 | 2005–2010 | 1 | 195 |
| Buhanan et al12 | 2012 | 1 | 1 | 1995–2008 | 1 | 126 |
| Kalejaiye and Pear13 | 2012 | 129 | 3 | NOT DOCUMENTED | 122 | 366 |
| Chaudhari and Kilby14 | 2011 | 161 | 4 | 2007–2010 | 102 | 408 |
| Goldenberg and French15 | 2011 | 170 | 5 | 2008–2009 | 167 | 1670 |
| Rigbye and Griffiths16 | 2011 | 327 | 13 | 2008–2009 | 327 | 4251 |
| Aujla et al17 | 2011 | 195 | 5 | 2005–2008 | 150 | 750 |
| Payne-James et al18 | 2009 | 43 | 4 | 2000–2008 | 41 | 164 |
| Agha19 | 2012 | 36 | 6 | 2005–2009 | 27 | 162 |
| The Royal College of Midwives20 | 2012 | 24 | 8 | 2010–2011 | 21 | 168 |
| Total | – | 1732 | – | – | 1480 | 15817 |
*Questions put to the NHS Litigation Authority were requests for case reports, as such only one question was asked, and the number of data was calculated as the number of reports received.
†Number of data is calculated as the number of questions asked multiplied by the number of full data responses.