| Paper | Country of origin | Type of diving | Data source | DCS incidents |
| DAN report 2009 [9] | USA | Recreational | Dive logs of 1069 divers volunteering for PDE & 150739 dives captured in year 2007 | 4 cases of DCS reported or 2.3 DCI incidents per 10,000 dives |
| Omhagen H et al. [17] | Sweden | Recreational | Review of literature | 40 cases treated for recompression per year |
| Landesberg PG [18] | South Africa | Recreational | Diving accident reports from 1st Jan 1969-31st Dec 1977 in SA | 4 diagnosed for DCS |
| Bessereau J et al. [19] | France | All | 10 years records of diver patients admitted to Hyperbaric Medicine Department in France | 69 cases |
| Marroni A et al. [20] | Italy | All | DCI records of 11 hyperbaric facilities in Italy in 10 years | 209 cases |
| Bierner RJ [21] | USA | Navy | Routine US Navy dive logs | 5 DCS incidents per 10,000 dives |
| Rice GM et al. [15] | USA | Navy | Hypobaric exposures and cases from training reports, Naval Operational Medicine Institute | 97 cases of altitude DCI per 50,355 hypobaric exposures |
| Dardeau MR et al. [13] | USA | Scientific | 10 years diving records of AAUS | 33 incidents or .32 per 10,000 person dives |