Table 2 Summary of studies included in the main meta-analysis
Study | Year of publication | No. of analyses included in meta-analysis | Date of publication | Database type | Study sample size | Measure of severity |
|---|---|---|---|---|---|---|
Aldridge et al. [41] | 2016 | 2 | Post-13/10/15 | Administrative | Over 1,000,000 | No measure of severity |
Anselmi et al. [20] | 2016 | 4 | Post-13/10/15 | Administrative | Over 1,000,000 | No measure of severity |
Aylin et al. [2] | 2010 | 1 | Pre-13/10/15 | Administrative | Over 1,000,000 | No measure of severity |
Bray et al. [5] | 2016 | 1 | Post-13/10/15 | Clinical registry/audit | 10,000 to 100,000 | Measure of severity |
Brims et al. [42] | 2011 | 1 | Pre-13/10/15 | Administrative | Less than 10,000 | Measure of severity |
Button et al. [43] | 2011 | 1 | Pre-13/10/15 | Administrative | 10,000 to 100,000 | No measure of severity |
Campbell et al. [34] | 2014 | 1 | Pre-13/10/15 | Clinical registry/audit | 10,000 to 100,000 | Measure of severity |
Giannoudis et al. [39] | 2016 | 1 | Post-13/10/15 | Clinical registry/audit | Less than 10,000 | No measure of severity |
Goldacre et al. [25] | 2013 | 1 | Pre-13/10/15 | Administrative | 10,000 to 100,000 | No measure of severity |
Haddock et al. [28] | 2015 | 1 | Post-13/10/15 | Administrative | Less than 10,000 | No measure of severity |
Handel et al. [44] | 2012 | 1 | Pre-13/10/15 | Administrative | Over 1,000,000 | No measure of severity |
Jairath et al. [21] | 2011 | 2 | Pre-13/10/15 | Clinical registry/audit | Less than 10,000 | Measure of severity |
Jansen et al. [23] | 2013 | 2 | Pre-13/10/15 | Administrative | Less than 10,000 | Measure of severity |
Karthikesalingam et al. [45] | 2014 | 1 | Pre-13/10/15 | Administrative | 10,000 to 100,000 | No measure of severity |
Li et al. [29] | 2016 | 1 | Post-13/10/15 | Clinical registry/audit | 10,000 to 100,000 | Measure of severity |
Maggs et al. [46] | 2010 | 1 | Pre-13/10/15 | Administrative | 10,000 to 100,000 | No measure of severity |
McLean et al. [47] | 2016 | 2 | Post-13/10/15 | Administrative | 100,000 to 1,000,000 | No measure of severity |
Meacock et al. [24] | 2017 | 2 | Post-13/10/15 | Administrative | 100,000 to 1,000,000 | No measure of severity |
Mohammed et al. [48] | 2012 | 2 | Pre-13/10/15 | Administrative | Over 1,000,000 | No measure of severity |
Ozdemir et al. [49] | 2015 | 1 | Pre-13/10/15 | Administrative | Less than 10,000 | No measure of severity |
Ozdemir et al. [50] | 2016 | 1 | Post-13/10/15 | Administrative | 100,000 to 1,000,000 | No measure of severity |
Palmer et al. [51] | 2012 | 1 | Pre-13/10/15 | Administrative | 10,000 to 100,000 | No measure of severity |
Palmer et al. [18] | 2015 | 1 | Post-13/10/15 | Administrative | Over 1,000,000 | No measure of severity |
Patel et al. [31] | 2016 | 1 | Post-13/10/15 | Administrative | 10,000 to 100,000 | No measure of severity |
Roberts et al. [27] | 2014 | 1 | Pre-13/10/15 | Administrative | 10,000 to 100,000 | No measure of severity |
Roberts et al. [52] | 2015 | 1 | Pre-13/10/15 | Administrative | 10,000 to 100,000 | No measure of severity |
Ruiz et al. [17] | 2015 | 2 | Pre-13/10/15 | Administrative | 100,000 to 1,000,000 | No measure of severity |
Sayers et al. [35] | 2017 | 1 | Post-13/10/15 | Clinical registry/audit | 100,000 to 1,000,000 | Measure of severity |
Schmulewitz et al. [26] | 2005 | 6 | Pre-13/10/15 | Administrative | Less than 10,000 | No measure of severity |
Shiue et al. [32] | 2017 | 1 | Post-13/10/15 | Administrative | 100,000 to 1,000,000 | No measure of severity |
Smith et al. [30] | 2014 | 1 | Pre-13/10/15 | Administrative | 10,000 to 100,000 | No measure of severity |
Thomas et al. [53] | 2014 | 1 | Pre-13/10/15 | Administrative | Less than 10,000 | Measure of severity |
Turner et al. [54] | 2016 | 1 | Post-13/10/15 | Administrative | 10,000 to 100,000 | Measure of severity |
Wunsch et al. [22] | 2004 | 2 | Pre-13/10/15 | Clinical registry/audit | 10,000 to 100,000 | Measure of severity |