Historian Niall Ferguson, in addition to figures from Keith Lowe, tabulated the total death rate for POWs in World War II as follows:[43][44]

Percentage of POWs that Died

Soviet POWs held by Germans 57.5%
German POWs held by Yugoslavs 41.2%
German POWs held by Soviets 35.8%
American POWs held by Japanese 33.0%
German POWs held by Eastern Europeans 32.9%
British POWs held by Japanese 24.8%
German POWs held by Czechoslovaks 5.0%
British POWs held by Germans 3.5%
German POWs held by French 2.58%
German POWs held by Americans 0.15%
German POWs held by British 0.03%

https://en.wikipedia.org/wiki/Prisoner_of_war