5% not relapsing is actually more than I would have expected, and an astonishingly high success rate for an intervention as easy as sleep deprivation. There's

5% not relapsing is actually more than I would have expected, and an astonishingly high success rate for an intervention as easy as sleep deprivation. There's also the hope of a sort of "learning effect": Chronically depressed people sometimes don't even know/remember the experience of normal or positive mood. Even short-lived fixes could allow them to find a way to better cope with the disease.