Deaths identified by the gold standard definition and Definition 1.1^*.

*Definitions 1.1 given in Table 1. †‘Zombie’ claims are the claims without ‘death’ issued after the index claim with ‘death’ given as the discharge/disease status. ‡Information on death in enrollment file provided by insurers was considered to be the gold standard information. ¶‘Zombie’ claims issued up to 1 or 2 months after the index claim. §‘Zombie’ claims issued up to 3 or more months after the index claim.