I am not really sure if there is a an established connection. Sometimes I am sleep deprived because of dissociating in the night (like when the system is badly triggered parts will cry through the night). But I don't know for sure that sleep deprivation would cause a greater level of dissociation. I suppose it could, just because sleep deprivation causes more stress or hampers ones ability to cope with stress, but I could well just be making **** up.