“…We excluded 1,627 individuals who dropped out, leaving a total of 100,823 elderly individuals. Among them, 24,558 were already disabled with low-(5,920; 24.1%), middle-(10,166; 41.4%), and highlevel disabilities (8,392; 34.1%), and 80 (0.3%) had been certified as low-or middle-level disability in February or March, but not in April 2011. Thus, there were 76,265 elderly individuals that remained nondisabled on April 1, 2011.…”