Cohorts represented
| Author | Year | N for VAS | N for ODI |
|---|---|---|---|
| Whang | 2015 | 102 | 102 |
| Vanaclocha | 2014 | 24 | 24 |
| Rudolf | 2014 | 17 | 17 |
| Sachs | 2014 | 144 | - |
| Ledonio | 2014a | - | 22 |
| Duhon | 2013 | 32 | 32 |
| Gaetani | 2013 | 10 | 10 |
| Schroeder | 2013 | 6 | 6 |
| Cummings | 2013 | - | 18 |
| Rudolf | 2012 | 50 | - |
| Mason | 2013 | 55 | - |
| Al-Khayer | 2008 | 9 | 9 |
| Overlapping cohorts excluded from analysis | |||
| Khurana | 2009 | Included in Mason 2013 | |
| Ledonio | 2014b | Includes 17pts from Cummings 2013 | |
| Rudolf | 2013 | Sub group analysis from Rudolf 2012 | |
| Graham-Smith | 2013 | Included in Sachs 2014 | |
| Rudolf | 2013 | ||
| Sachs | 2013 | ||
| Sachs | 2012 | ||