Constantini et al 20101 | Israel | Prospective intervention with historical control | Private | 1996–2005 (control) | Prospective | Medical attention | Yes | Yes |
Knapik et al 20112 | USA | Prospective cohort | Internally—Federal Bureau of Investigation and US Army Public Health Command | 2009–2010 | Prospective | Medical attention | Yes | No |
Lockie et al 201921 | USA | Retrospective cohort | No funding | Not reported | Prospective | Withdrawal from programme | No | No |
Orr et al 20163 | Australia | Retrospective cohort | Not reported | 2013–2014 | Prospective | Medical attention | No | No |
Orr et al 201618 | Australia | Randomised controlled trial | Not reported | Not reported | Prospective | Medical attention | No | Yes |
Orr et al 201719 | Australia | Retrospective cohort | No funding | 2013 | Prospective | Medical attention | No | No |
Tomes et al 202024 | New Zealand | Retrospective cohort | Not reported | Not reported | Prospective | Medical attention | No | Yes |
Wang et al 200325 | China | Retrospective cohort | Not reported | 1999–2000 | Prospective | Medical Attention | No | No |