TABLE 2.

Agreement among four definitions (kappa statistics)

	κ(95%CI)
	Surprise death	Unexpected death	PS‐defined sudden death
Rapid decline death	0.56 (0.50–0.62)	0.53 (0.47–0.59)	0.19 (0.13–0.25)
Surprise death	—	0.77 (0.72–0.82)	0.18 (0.11–0.25)
Unexpected death	—	—	0.19 (0.12–0.26)
PS‐defined sudden death	—	—	—

Abbreviation: CI, confidence interval

— indicates overlapping data