| Author | Year | Risk ratio | 95% confidence interval |
| Bonovas et al. [75] | 2005 | 1.03 | 0.93 - 1.14 |
| Dale et al. [76] | 2006 | 1.02 | 0.97 - 1.07 |
| Browning et al. [77] | 2007 | 1.01 | 0.79 - 1.30 |
| Kuoppala et al. [78] | 2008 | 1.04 | 0.74 - 19 |
| Baigent et al. [79] | 2010 | 1.07 | 0.84 - 1.38 |
| Undela et al. [80] | 2012 | 0.99 1.03 | 0.94 - 1.04 (statin use) 0.96 - 1.11 (long term statin use) |