What was the most common method of escape for prisoners of war in World War 2?

Technically, most POW escaped in transit from the place of their capture to rear areas. Once firmly in enemy territory, their chances were drastically reduced. In the confusion of battle however, opportunities often appeared to slip away unnoticed. Friendly lines would be reasonably close. But of course, with escaping POW we usually think of those interned in camps, and their method of preference of escaping: By digging tunnels under the compound to beyound the fence line. They took elaborate concealment tactics to avoid the Germans finding them. In Japanese prison camps escape was less done. One there was no where to escape to, and two the Japanese kept the prisoners so under nourished they didn't have the engery to dig tunnels. Rather few were actually interned in camps for the duration of their captivity. Most POWs, Axis and allies, left camps for work on a daily basis, e.g. working on farms or in factories. Opportunities for escape were theoretically plenty, but being in the middle of an enemy nation made escape inauspicious anyway.